When Cole Hamels signed a one-year, $18 million deal with the Atlanta Braves this offseason, the Cubs ended up with a hole to fill in the final spot in the starting rotation. The Chicago staff, as a whole – both the rotation and the bullpen – come with a degree of uncertainty as camp opens in Mesa.
Of course, most people are more focused on that bullpen, as well as the glaring needs in both center field and second base than the starting five. That being said, the starters arguably have the most to prove.