: In any case, I think Viola would have made a better signing. Why? : Viola is younger, and is left handed (how many left handed starters does : Toronto have? Well, I agree that Viola is a better signing. However, why does everyone say that you want lefthanded starters? I understand lefthanded spot relievers, even though they usually face more righthanded batters than lefthanded batters. I just don't understand why people insist on lefthanded starters, unless there is a park effect (e.g., Yankee Stadium). Most batters in MLB are righthanded, so righthanded starters will have the platoon advantage more often than lefthanded starters. I guess one argument for lefty starters is that certain teams may be more vulnerable to LHP's than RHP's. However, this is probably only a factor in the postseason, because teams seldom juggle their starters for this reason during the regular season. I think you just want the best starters you can get, regardless of whether they are lefties or righties. Lefthanded starters tend to have higher ERA's than righthanded starters, precisely because managers go out of their way to start inferior lefties (or perhaps because of the platoon advantage). Am I missing something here?