Chase Headley told MLB.com's Corey Brock that he will not negotiate a contract extension during the season. Padres executive chairman Ron Fowler said Wednesday that he and his front office brethren were preparing "the largest offer" in club history for Headley with plans to officially propose it to the third baseman "before midseason." But Headley, who is currently under organizational control through 2014, wants no part. "We made it abundantly clear [before] that we didn't want to talk about it during the season," the 28-year-old told Brock on Thursday morning.