Originally Posted by
TheLeviathan
Right, so why leave out the other half about how many runs they allowed. ERA, as just an immediate example, factors both innings and runs allowed. There are other pitching stats that do much the same.
Innings pitched isn't a very good catch-all stat because many times innings are pitched for reasons other than the talent or performance of the pitcher. Like, for example, an exhausted bullpen. Or injuries. Did Blackburn, Liriano, and Duensing pitch almost 100 innings last year because they were good pitchers?
Durability is good, but you want durability from players that are talented and effective. Durability can be trained, talent is much harder.