Per Chad Dotson of ESPN.com:

Not only is Peavy out for his next spring start, Thursday against the Cubs, manager Ozzie Guillen is also saying the right-hander likely will miss the start of the season, which means a stint on the 15-day disabled list could be forthcoming.

Dotson says Phillip Humber will likely get the nod as the 5th starter, but thinks it should be Chris Sale. I disagree. If Peavy will be back my May 1st I would rather keep Sale in the bullpen.