The bigger of the two setbacks was suffered by Rubby De La Rosa, who will undergo his second Tommy John procedure. De La Rosa has been struggling with arm problems since May of 2016. After two rapidly-truncated starts in September, he underwent stem-cell therapy in the hope of avoiding TJ, and also moved from the rotation to the bullpen. He started the year on the disabled list, but pitched in two stints with the major-league team, posting a 4.70 ERA over 7.2 innings. He was optioned down to Reno earlier this month, and had made three appearances from them, the last on August 12th.
Arizona Diamondbacks double-punch: Yasmany Tomas, Rubby De La Rosa suffer injury setbacks
