Martinez (shoulder) will begin throwing off a mound Tuesday, Anne Rogers of MLB.com reports.
Martinez underwent offseason shoulder surgery after performing solely as a reliever in 2019. It's unclear how long his shoulder was an issue, but it could help to explain some of his struggles during the postseason. The right-hander expressed a desire to compete for a spot in the starting rotation next season, and he could be ready to do so by spring training if his recovery continues smoothly.