Given that this information is coming from a rival, it's unclear if this is anything more than speculation. The team does have many candidates for the rotation, but it's an issue of quantity over quality. None of the club's contenders are proven commodities. Jason Hammel and Wei-Yin Chen were effective last season but need to prove their performances are sustainable. Although Arrieta, Britton, Brian Matusz and Chris Tillman were once thought to be the future of the club's rotation, none have emerged as strong options.