4th is the best spot for him after Lester, Lackey and Peavy.
Yes, IF he could stay healthy, which he can’t.
Trade him and resign Lester to a long term deal. Then move Workman to the starting rotation, see what Peavy does and go from there.
Peavy’s off the books after next year; Lackey after 2015.T hey should have more youngsters or free agents to plug in to those spots.