1. A pitcher's ERA (earned run average) is only counted if he pitched at least 50 innings during the season for the specified team. The raw data come from the archive at seanlahman.com. This database is copyright 1996-2014 by Sean Lahman. This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License. For details see: http://creativecommons.org/licenses/by-sa/3.0/
   
2. Batting, pitching, fielding, personal, team, and awards data come from the archive at seanlahman.com. This database is copyright 1996-2014 by Sean Lahman. This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License. For details see: http://creativecommons.org/licenses/by-sa/3.0/
   

Jack Pfiester of the 1906 Chicago Cubs threw left-handed, was a 20-game winner, played on a winning team, played in West Side Park II, and was born in Ohio.

• achievement score (4.8 see References)
• assists (62)
• complete games (20)
• double plays (1)
• games finished (2)
• games played (31)
• games started (29)
• innings pitched (250.7)
• putouts (21)
• saves (0)
• shutouts (4)
• strikeouts (153)
• strikeouts per nine innings (5.5)
• winning percentage (71.4%)
• wins (20)
• balks (1)
• earned run average (1.51)
• earned runs (42)
• errors (7)
• hit by pitch (13)
• hits (173)
• hits per nine innings (6.2)
• homers given up (3)
• homers per nine innings (.1)
• losses (8)
• runs allowed (63)
• walks (63)
• walks per nine innings (2.3)
• wild pitches (4)
• age (28 yrs)
• batters faced (956)
• height (5'11")
• innings pitched per game (8.1)
• weight (180 lbs)

Sources