Game Score
Game score is a metric devised by Bill James and first presented in the 1988 Baseball Abstract to show how dominate a pitcher was in any particular game. The formula leans heavy on strikeouts, so a normal two hitter by Jamie Moyer versus a normal two hitter by Roger Clemens will have drastically different scores.

Game Scores For All of 2004

Top 10 Game Scores Of The Season
04/26 - 85 (T. Lilly)
06/09 - 85 (M. Batista)
07/20 - 83 (D. Bush)
05/27 - 77 (R. Halladay)
04/15 - 75 (R. Halladay)
07/22 - 72 (T. Lilly)
06/03 - 70 (M. Batista)
06/11 - 69 (P. Hentgen)
06/23 - 69 (R. Halladay)
07/01 - 69 (M. Batista)

Average Game Scores By Starter
60 - D. Bush
52 - M. Batista
52 - T. Lilly
50 - J. Miller
49 - R. Halladay
43 - J.Towers
39 - P. Hentgen
33 - J. Kersner

Formula: Start with 50 points. Add 1 point for each out recorded, (3 points per inning). Add 2 points for each inning completed after the 4th. Add 1 point for each strikeout. Subtract 2 points for each hit allowed. Subtract 4 points for each earned run allowed. Subtract 2 points for each unearned run allowed. Subtract 1 point for each walk