Why don't we go to a 4-man rotation like in the good old days? Can anybody tell me that? We can avoid the Lacky problem almost entirely and let him work out his stuff in the pen or as a spot starter.

I have been doing a little research (very, very little) on the demise of the 4-man rotation and so far I haven't found anything conclusive. What I mean is, you would assume teams had some epiphany that pitchers were been worn out by the 4-man, but what I have seen so far doesn't indicate that it was because of durability concerns. Anybody out there know for sure why pitch counts and 5-man staffs came into prominence about 1975? Any guesses?