The Sun Times’ Gordon Wittenmyer looks at Jeff Samardzija’s development into the staff ace and Ian Stewart’s disappointing spring; and he predicts how many wins the Cubs will have in 2013.

Chicago Cubs starting pitcher Jeff Samardzija (29) walks to the dugout after finishing the first inning against the San Francisco Giants in a Cactus League game at HoHoKam Park in Mesa, Ariz. on Sunday, Feb. 24, 2013. (José M. Osorio/ Chicago Tribune)

