Kumar Rocker

Rocker had a quick ascension to the majors in 2024 following his return from Tommy John surgery, but his fall in 2025 was nearly as rapid. The 26-year-old made the Rangers' Opening Day rotation despite a lackluster spring training, but he was knocked around in five starts before going down with a right shoulder impingement. Rocker failed to muster any momentum after that either in the majors or minors, and at one point late in the year at Triple-A Round Rock he was shut down for six weeks in order to work on his mechanics. Left-handed batters hit .319/.386/.522 off Rocker, which is a big reason why he went away from using his trademark slider as the year went on. He might be best off deployed as a reliever over the long haul, but Rocker will be given another shot to start in 2026. Read Past Outlooks