The Red Sox might lighten the load on their starters, especially if Curt Schilling can keep his weight down. Team officials have discussed using a six-man rotation next season rather than the five-man norm as Boston tries to defend its World Series championship. Schilling agreed to an $8 million contract Tuesday with $3 million in potential performance bonuses. He also can make an additional $2 million by meeting weight clauses ? $333,333 for each time he passes one of six random monthly weigh-ins. His salary in 2007 was $13 million, but he spent seven weeks on the disabled list with tendinitis in his right shoulder. "The responsibility falls on me," Schilling said. "There are 2 million reasons for me to reach the weight goal."