A staple at the back end of the Texas rotation for the last four seasons, Martinez has never held much appeal outside of AL-only settings due to his poor peripherals. Martinez's ability to eat innings -- as well as a lack of attractive alternatives -- was enough to keep him around in 2017, but a slight uptick in velocity didn't do anything to improve his outlook. The meager gains Martinez made in controlling the zone were completely undermined by his failure to keep the ball in the yard, as Martinez's 2.1 HR/9 rate was the second-worst mark in the majors of any pitcher who covered 110 innings. The Rangers ultimately came to the realization that Martinez's flyball tendencies and lack of strikeout stuff weren't a recipe for success at Globe Life Park, prompting the team to non-tender him in the offseason. Martinez, who underwent sports hernia surgery in November, is expected to be at full strength for spring training, but he'll most likely have to settle for a minor-league deal coming off a career-worst campaign.