1. For batters, we calculate an achievement score based on a complex formula that takes into account batting, base running, and fielding statistics, plus personal awards (MVP, Triple Crown, Gold Glove, and All-Star). For pitchers, their achievement score is based on a different formula that takes into account their wins, losses, saves, personal awards (similar as for batters, plus the Cy Young and Rolaids Relief Man awards), and earned run average. Team achievement scores are based on the number of wins that season with bonuses for post-season achievements: 10, 20, 30, and 40 for winning a wildcard, division, pennant, and World Series respectively. A player or team's best year is defined as the season with his highest achievement score. 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/
   

Roberto Hernandez of the 1996 Chicago White Sox threw right-handed, made the All-Star team, played on a winning team, attended both University of South Carolina Aiken and University of Connecticut, played in Comiskey Park II, and was born in Puerto Rico.

• salary ($2.1M)
• achievement score (5.8 see References)
• assists (6)
• complete games (0)
• double plays (0)
• games finished (61)
• games played (72)
• games started (0)
• innings pitched (84.7)
• putouts (3)
• saves (38)
• shutouts (0)
• strikeouts (85)
• strikeouts per nine innings (9.0)
• winning percentage (54.5%)
• wins (6)
• balks (0)
• earned run average (1.91)
• earned runs (18)
• errors (1)
• hit by pitch (0)
• hits (65)
• hits per nine innings (6.9)
• homers given up (2)
• homers per nine innings (.2)
• intentional walks (5)
• losses (5)
• runs allowed (21)
• walks (38)
• walks per nine innings (4.0)
• wild pitches (6)
• age (32 yrs)
• batters faced (355)
• height (6'4")
• innings pitched per game (1.2)
• weight (220 lbs)

Sources