1. A player's age is calculated by subtracting his birth year from the season year. 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/
   

Walt Masterson of the 1939 Washington Senators threw right-handed, was debuting in the majors, played on a losing team, played in Griffith Stadium I, and was born in Philadelphia.

• achievement score (.000 see References)
• assists (9)
• complete games (1)
• double plays (0)
• games finished (14)
• games played (24)
• games started (5)
• innings pitched (58.3)
• putouts (2)
• saves (0)
• shutouts (0)
• strikeouts (12)
• strikeouts per nine innings (1.9)
• wins (2)
• balks (0)
• earned run average (5.55)
• earned runs (36)
• errors (2)
• hit by pitch (2)
• hits (66)
• hits per nine innings (10.2)
• homers given up (2)
• homers per nine innings (.3)
• losses (2)
• runs allowed (44)
• walks (48)
• walks per nine innings (7.4)
• wild pitches (2)
• age (19 yrs)
• batters faced (287)
• height (6'2")
• innings pitched per game (2.4)
• weight (189 lbs)

Sources