His first call-up as a rookie in 1995 saw him post a robust 5.51 earned run average (ERA), leading to trade talk.

FORBES: One unbeatable move can make you a legend.

Pitchers were primarily rated on winning percentage, earned run average (ERA) and innings, with limited weight given to strikeouts and (inversely) walks and hits allowed per nine innings.

FORBES: Ten Worthy Of Cooperstown

Pitching in an era of explosive offense, his 3.17 earned run average over that span was nearly a run a game lower than that of an average starting pitcher.

FORBES: Overlooked for Cooperstown

With a record of 240-138 (.635), a 3.88 earned run average (pitching mostly in an era of big offense) and ten seasons with at least 200 innings, he rates as one of the top pitchers of his time.

FORBES: Is Pettitte A Hall of Famer?

Since 2003, the teams with 1, 000-inning rotations posted a 3.76 bullpen earned-run average, compared with a 4.05 ERA for everybody else.

WSJ: 1,000: The Number That