The Cubs biggest move of the offseason may have impacted the rotation, but there are still plenty of questions on how the other four players will perform. The Cubs won the Jon Lester sweepstakes, but the rest of the rotation remains intact. Even Jason Hammel can back after a brief departure to Oakland. While Hammel and Jake Arrieta have plenty of upside, the team will still have to depend on a shaky back-end. Aside from Lester, who can you really trust moving forward?