Mawell had exercised an opt-out clause, and obviously Miami was not willing to add him to the 40-man. His deal would have paid him $1.1MM at the major league level. The 32-year-old had an early-season renaissance with the Giants last year, but ultimately produced at just a .209/.275/.341 clip in his 274 plate appearances on the season.
Kelly, meanwhile, was an Article XX(B) free agent and thus would’ve been due a $100K roster bonus had he been kept in the minors. Now 36, Kelly took just one major league plate appearance last year, though he did make a big league showing for the seventh consecutive season. The glove-first infielder also only managed to suit up for a dozen minor league games with the Miami organization in 2015.