Baseball Player Won-Lost Records



Games and Seasons for which Player Won-Lost Records are Calculated

Last updated March 18, 2016

At present, Player won-lost records are available for the following seasons. Seasons in bold are missing some games.

1921 (NL only), 1922, 1925, 1927
1930 - 1945
1946 - 2015
Most Recent Updates to Player Won-Lost records

Correction of Error in Identifying First Fielder on Hits
Recently, in looking into fielding records for several players, I realized that I was failing to identify the first fielder on many (in many seasons, most) hits. I have corrected this error and uploaded revised Player won-lost records as of March 18, 2016. The primary effect of this correction is on fielding records, but it also affects the split between pitchers and fielders on balls in play. On offense, this should not have affected the results, although it would have affected positional averages (and replacement levels), leading to changes for all players' WOPA and WORL measures. My apologies for this error and for not finding and correcting it sooner.

Most Recent Retrosheet Update
Player won-lost records are calculated using play-by-play data. The source of this play-by-play data is Retrosheet. Retrosheet released its most recent set of play-by-play data on December 6, 2015.

This release included the 2015 season. In addition, Retrosheet has released play-by-play data for 368 games for various seasons prior to 1946. In addition to new play-by-play data, Retrosheet has also updated and improved the play-by-play data for many games. This includes the "promotion" of 44 games from deduced accounts to "event files" (see below for a further discussion of this distinction). These data were incorporated into my Player won-lost records on December 23, 2015.

For seasons with missing data, teams are missing the following numbers of games. Team records in missing games are shown in parentheses (W-L-T).

1945

American League

Boston 58(25-32-1)
Chicago 74(40-33-1)
Cleveland 63(33-29-1)
Detroit 57(33-23-1)
New York 32(17-15-0)
Philadelphia 53(15-38-0)
St. Louis 55(31-24-0)
Washington 0


National League

Boston 49(21-27-1)
Brooklyn 1(0-1-0)
Chicago 39(26-13-0)
Cincinnati 0
New York 11(4-6-1)
Philadelphia 44(15-29-0)
Pittsburgh 45(25-19-1)
St. Louis 39(21-17-1)


1944

American League

Boston 124(61-61-2)
Chicago 131(67-64-0)
Cleveland 131(61-69-1)
Detroit 127(70-55-2)
New York 83(47-36-0)
Philadelphia 77(29-47-1)
St. Louis 128(74-54-0)
Washington 135(56-79-0)


National League

Boston 76(32-44-0)
Brooklyn 5(4-1-0)
Chicago 91(41-49-1)
Cincinnati 0
New York 51(21-30-0)
Philadelphia 53(23-30-0)
Pittsburgh 90(49-38-3)
St. Louis 78(49-27-2)


1943

American League

Boston 110(43-65-2)
Chicago 138(71-66-1)
Cleveland 121(66-55-0)
Detroit 137(68-68-1)
New York 63(42-21-0)
Philadelphia 86(28-57-1)
St. Louis 131(64-66-1)
Washington 120(68-52-0)


National League

Boston 76(33-43-0)
Brooklyn 4(3-1-0)
Chicago 99(48-50-1)
Cincinnati 0
New York 95(32-62-1)
Philadelphia 76(38-36-2)
Pittsburgh 78(39-38-1)
St. Louis 92(64-27-1)


1942

American League

Boston 112(70-42-0)
Chicago 104(49-55-0)
Cleveland 34(11-23-0)
Detroit 113(53-60-0)
New York 33(24-9-0)
Philadelphia 78(30-48-0)
St. Louis 111(65-46-0)
Washington 109(45-64-0)


National League

Boston 89(39-49-1)
Brooklyn 0
Chicago 98(43-54-1)
Cincinnati 0
New York 85(48-36-1)
Philadelphia 71(18-53-0)
Pittsburgh 80(39-39-2)
St. Louis 99(71-27-1)


1941

American League

Boston 72(44-28-0)
Chicago 100(48-50-2)
Cleveland 20(9-11-0)
Detroit 103(49-53-1)
New York 0
Philadelphia 64(30-34-0)
St. Louis 100(46-52-2)
Washington 101(51-49-1)


National League

Boston 102(46-56-0)
Brooklyn 0
Chicago 102(46-55-1)
Cincinnati 0
New York 103(52-49-2)
Philadelphia 86(29-56-1)
Pittsburgh 93(53-39-1)
St. Louis 92(60-31-1)


1940

American League

Boston 82(47-35-0)
Chicago 88(51-37-0)
Cleveland 2(2-0-0)
Detroit 94(56-37-1)
New York 15(6-9-0)
Philadelphia 47(16-31-0)
St. Louis 99(41-57-1)
Washington 87(37-50-0)


National League

Boston 73(28-45-0)
Brooklyn 6(4-2-0)
Chicago 75(39-36-0)
Cincinnati 0
New York 84(47-37-0)
Philadelphia 68(19-49-0)
Pittsburgh 61(42-18-1)
St. Louis 91(49-41-1)


1939

American League
Boston 61(39-22-0)
Chicago 56(34-22-0)
Cleveland 86(45-41-0)
Detroit 81(48-32-1)
New York 9(7-2-0)
Philadelphia 6(2-4-0)
St. Louis 83(21-61-1)
Washington 86(37-49-0)


National League

Boston 55(19-35-1)
Brooklyn 48(27-20-1)
Chicago 60(38-22-0)
Cincinnati 1(1-0-0)
New York 59(30-29-0)
Philadelphia 64(18-46-0)
Pittsburgh 55(25-30-0)
St. Louis 68(46-22-0)


1938

American League

Boston 61(38-23-0)
Chicago 62(27-34-1)
Cleveland 20(11-9-0)
Detroit 85(47-37-1)
New York 11(8-3-0)
Philadelphia 45(17-28-0)
St. Louis 76(29-45-2)
Washington 84(43-41-0)


National League

Boston 57(30-27-0)
Brooklyn 49(25-22-2)
Chicago 29(12-16-1)
Cincinnati 0
New York 58(32-25-1)
Philadelphia 61(14-46-1)
Pittsburgh 61(42-17-2)
St. Louis 65(31-33-1)


1937

American League

Boston 40(13-25-2)
Chicago 24(17-7-0)
Cleveland 19(12-6-1)
Detroit 55(35-19-1)
New York 9(6-3-0)
Philadelphia 3(2-1-0)
St. Louis 37(7-29-1)
Washington 53(25-27-1)


National League

Boston 26(13-13-0)
Brooklyn 31(11-19-1)
Chicago 22(13-9-0)
Cincinnati 0
New York 31(22-9-0)
Philadelphia 45(18-27-0)
Pittsburgh 11(3-8-0)
St. Louis 40(21-16-3)


1936

American League

Boston 27(9-18-0)
Chicago 31(17-12-2)
Cleveland 10(4-5-1)
Detroit 72(41-31-0)
New York 33(23-10-0)
Philadelphia 34(12-21-1)
St. Louis 79(30-47-2)
Washington 70(39-31-0)


National League

Boston 27(10-16-1)
Brooklyn 56(29-26-1)
Chicago 70(36-34-0)
Cincinnati 0
New York 87(52-35-0)
Philadelphia 72(23-49-0)
Pittsburgh 92(43-48-1)
St. Louis 98(56-41-1)


1935

American League

Boston 58(24-34-0)
Chicago 47(24-23-0)
Cleveland 12(9-2-1)
Detroit 69(42-27-0)
New York 36(23-13-0)
Philadelphia 1(0-1-0)
St. Louis 81(31-50-0)
Washington 76(36-39-1)


National League

Boston 59(11-48-0)
Brooklyn 4(3-1-0)
Chicago 39(23-16-0)
Cincinnati 0
New York 32(21-10-1)
Philadelphia 74(30-43-1)
Pittsburgh 65(36-29-0)
St. Louis 71(47-24-0)


1934

American League

Boston 67(29-37-1)
Chicago 43(14-29-0)
Cleveland 21(15-6-0)
Detroit 68(46-22-0)
New York 41(23-18-0)
Philadelphia 5(1-3-1)
St. Louis 65(32-32-1)
Washington 68(27-40-1)


National League

Boston 51(14-29-0)
Brooklyn 5(4-1-0)
Chicago 39(23-16-0)
Cincinnati 0
New York 35(14-21-0)
Philadelphia 57(18-39-0)
Pittsburgh 65(37-28-0)
St. Louis 52(30-22-0)


1933

American League

Boston 50(20-30-0)
Chicago 28(13-15-0)
Cleveland 11(3-8-0)
Detroit 67(31-35-1)
New York 31(20-9-2)
Philadelphia 1(1-0-0)
St. Louis 41(16-24-1)
Washington 59(38-21-0)


National League

Boston 37(14-22-1)
Brooklyn 3(0-3-0)
Chicago 22(15-7-0)
Cincinnati 0
New York 33(14-17-2)
Philadelphia 31(11-20-0)
Pittsburgh 15(10-5-0)
St. Louis 39(24-14-1)


1932

American League

Boston 60(17-43-0)
Chicago 33(9-23-1)
Cleveland 2(1-0-1)
Detroit 73(42-30-1)
New York 30(18-11-1)
Philadelphia 3(1-2-0)
St. Louis 39(18-21-0)
Washington 66(45-21-0)


National League

Boston 70(38-31-1)
Brooklyn 6(2-4-0)
Chicago 35(19-16-0)
Cincinnati 19(8-10-1)
New York 40(20-20-0)
Philadelphia 38(15-23-0)
Pittsburgh 58(32-26-0)
St. Louis 38(16-20-2)


1931

American League

Boston 45(17-27-1)
Chicago 31(11-19-1)
Cleveland 6(4-2-0)
Detroit 56(21-35-0)
New York 31(21-9-1)
Philadelphia 3(3-0-0)
St. Louis 42(20-22-0)
Washington 54(35-18-1)


National League

Boston 35(15-20-0)
Brooklyn 9(4-5-0)
Chicago 24(16-8-0)
Cincinnati 16(6-10-0)
New York 17(10-7-0)
Philadelphia 29(12-17-0)
Pittsburgh 10(3-7-0)
St. Louis 40(24-16-0)


1930

American League

Boston 46(13-33-0)
Chicago 31(13-18-0)
Cleveland 3(3-0-0)
Detroit 74(41-33-0)
New York 27(14-13-0)
Philadelphia 7(4-3-0)
St. Louis 58(28-30-0)
Washington 66(40-26-0)


National League

Boston 47(23-24-0)
Brooklyn 6(2-4-0)
Chicago 25(13-11-1)
Cincinnati 35(12-23-0)
New York 16(9-7-0)
Philadelphia 53(18-34-1)
Pittsburgh 19(8-11-0)
St. Louis 59(44-15-0)


1927

American League

Boston 46(11-35-0)
Chicago 21(12-9-0)
Cleveland 2(2-0-0)
Detroit 59(30-26-3)
New York 0
Philadelphia 10(7-3-0)
St. Louis 25(10-14-1)
Washington 53(33-18-2)


National League

Boston 37(16-21-0)
Brooklyn 33(15-17-1)
Chicago 23(15-8-0)
Cincinnati 14(6-8-0)
New York 28(18-9-1)
Philadelphia 31(8-23-0)
Pittsburgh 1(0-1-0)
St. Louis 21(15-6-0)


1925

American League

Boston 58(16-42-0)
Chicago 20(11-9-0)
Cleveland 3(0-3-0)
Detroit 68(36-31-1)
New York 24(3-20-1)
Philadelphia 17(13-4-0)
St. Louis 41(28-13-0)
Washington 71(43-28-0)


National League

Boston 36(12-24-0)
Brooklyn 0
Chicago 18(8-10-0)
Cincinnati 18(12-6-0)
New York 18(10-8-0)
Philadelphia 34(16-18-0)
Pittsburgh 0
St. Louis 32(20-12-0)


1922

American League

Boston 82(29-53-0)
Chicago 26(12-14-0)
Cleveland 10(6-4-0)
Detroit 88(50-37-1)
New York 19(13-6-0)
Philadelphia 56(21-34-1)
St. Louis 76(52-24-0)
Washington 87(38-49-0)


National League

Boston 50(18-32-0)
Brooklyn 21(10-10-1)
Chicago 10(6-4-0)
Cincinnati 29(16-13-0)
New York 18(12-5-1)
Philadelphia 39(17-22-0)
Pittsburgh 0
St. Louis 57(32-25-0)


1921 National League

Boston 49(27-22-0)
Brooklyn 11(2-9-0)
Chicago 25(9-16-0)
Cincinnati 34(17-17-0)
New York 17(9-8-0)
Philadelphia 32(7-25-0)
Pittsburgh 0
St. Louis 74(50-24-0)


Deduced Games

For games for which Retrosheet is unable to find play-by-play data, they construct what they call "deduced" games. These are play-by-play accounts which are constructed based on box score data and newspaper stories. In many cases, the resulting games are "plausible" but not necessarily unique. That is, there may be some uncertainty, for example, as to whether a particular batter singled in the first or third inning of a game.

Retrosheet distinguishes between what it calls "event files" - which consist exclusively (or, at least, almost exclusively) of known play-by-play events - and "deduced accounts" - which may contain some uncertainties. Retrosheet also only releases deduced games for full seasons. Working backwards in time, Retrosheet has released deduced games which cover every game for which event files are not available from 1946 through the present. I have helped to deduce a number of these games, starting with the 1949 season, and am continuing this deduction work for the 1945 season.

The total number of deduced games per season which are currently used in constructing Player won-lost records are shown in the next table. Note that Retrosheet has complete play-by-play data for all seasons since 1974 (as well as 1960, 1961, 1969, and 1970).

Season Deduced Games % of Total
1946 21016.9%
1947 14511.7%
1948 16913.7%
1949 16013.0%
1950 14812.0%
1951 1098.8%
1952 1048.4%
1953 695.6%
1954 554.5%
1955 584.7%
1956 463.7%
1957 272.2%
1958 60.5%
1959 40.3%
1960 00.0%
1961 00.0%
1962 40.2%
1963 30.2%
1964 20.1%
1965 100.6%
1966 70.4%
1967 70.4%
1968 221.4%
1969 00.0%
1970 00.0%
1971 90.5%
1972 20.1%
1973 20.1%


A total of 44 games were "promoted" from deduced games to event files with Retrosheet's latest release (3.1% of all deduced games as of Retrosheet's penultimate release).

For my purposes, I have calculated Player won-lost records from both sources: event files and deduced files. I have chosen to do so largely under the basic premise that some data is better than no data.

For (context-neutral, teammate-adjusted) eWins, the timing of events doesn't really matter, only that events happened - i.e., all that matters is that a player went 2-for-4 with a single, double, and strikeout in his 4 at bats, not when the hits happened or how many runners were on base when he struck out. Strictly speaking, this knowledge does not require play-by-play data, merely box-score level data, which are available and known with relative certainty for all deduced games (and, in fact, for all games dating back to 1913).

For pWins and pLosses, which are context-dependent, the exact timing of these events will matter. Even for deduced games, however, the timing of most events actually are known, and this is more true the more important the event (e.g., events associated with run-scoring innings are typically reasonably well covered in newspaper stories). Because pWins and pLosses are a perfect accounting structure with a fixed number of pWins and pLosses assigned within any single game (2 pWins and 1 pLoss to the winning team, 1 pWin and 2 pLosses to the losing team), any errors in credit based on the uncertainty of events will be limited to a single game and a single team: that is, if I have inadvertently credited too many pWins to a specific player in a specific game, I must have similarly credited too few pWins to this player's teammates. This could certainly still lead to errors in the calculation of Player won-lost records, but, I believe, it minimizes the likely significance of such errors.
Nevertheless, Player won-lost records based on deduced game accounts should, perhaps, be viewed with more caution than Player won-lost records based on event files. More generally, the quality of Player won-lost calculations is a direct function of the quality of the underlying play-by-play data and that quality generally declines the farther back in time one goes. This is perhaps most significant with respect to fielding records. It is common, for example, for the exact nature of batting outs to be uncertain (i.e., we know that a batter made an out, but don't know if he grounded out to the second baseman or flew out to left field, etc.) for most deduced games, but also for many event files as one moves farther back in time. In general, these uncertainties are probably somewhat greater within deduced games than within event files, but the reality is that these uncertainties move along a continuum from highly uncertain deduced games to very good deductions to somewhat weak event files to highly detailed event files.

Overall, while recognizing that there are uncertainties surrounding certain plays in certain games over time, I believe that the Player won-lost records presented on this website are calculated as accurately as possible given the data available to me as of today. I am also reasonably certain that the quality of these data will only continue to improve over time as Retrosheet continues its ongoing and impressive efforts to constantly add more and better data to its already impressive historical dataset.

Notes about Articles on the Website

The articles on this site are all written so that they pull data directly from the most recent version of the Player won-lost database. Hence, any numbers cited within these articles should automatically incorporate the most recent update to Player won-lost records. In some cases, however, the accompanying text may have been written based on previous versions of Player won-lost records. I apologize if this results in non-sensical text in any cases.

I hope you enjoy the Player won-lost records that I have available here. Thank you for visiting and please come back often!

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The information used here was obtained free of charge from and is copyrighted by Retrosheet. Interested parties may contact Retrosheet at "www.retrosheet.org".
Baseball player won-lost records have been constructed by Tom Thress. Feel free to contact me by e-mail or follow me on Twitter.