1. 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/
   
2. Strikeouts, walks, hits and homers per nine innings, and innings per game, are counted only if at least 50 innings were pitched 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/
   

Big Jeff Pfeffer of the 1911 Boston Rustlers threw right-handed, played on a losing team, attended the University of Illinois at Urbana-Champaign, played in South End Grounds III, and was born in Illinois.

• achievement score (.500 see References)
• assists (25)
• complete games (4)
• double plays (0)
• games finished (16)
• games played (26)
• games started (6)
• innings pitched (97.0)
• putouts (10)
• saves (2)
• shutouts (1)
• strikeouts (24)
• strikeouts per nine innings (2.2)
• winning percentage (58.3%)
• wins (7)
• balks (0)
• earned run average (4.73)
• earned runs (51)
• errors (0)
• hit by pitch (0)
• hits (116)
• hits per nine innings (10.8)
• homers given up (3)
• homers per nine innings (.3)
• losses (5)
• runs allowed (74)
• walks (57)
• walks per nine innings (5.3)
• wild pitches (1)
• age (29 yrs)
• batters faced (442)
• height (6'1")
• innings pitched per game (3.7)
• weight (185 lbs)

Sources