Mat Latos has plenty to prove after pitching for three teams a season ago. Once considered a pitcher on the rise with 14-win seasons in 2010, 2012 and 2013, Latos began last year with Miami before stints with the Los Angeles Dodgers and Los Angeles Angels. Latos had not posted an ERA worse than 3.48 in his previous four seasons, and his poor campaign resulted in a $3 million, one-year contract with Chicago.