The Texas Rangers have optioned Kumar Rocker to Triple-A and activated Chris Martin from the 15-day IL in a significant roster shakeup.

Rangers right-hander Kumar Rocker, who has an 8.87 ERA in 23⅓ innings this season, was sent to Triple-A Round Rock.

TAMPA — A day after Kumar Rocker’s rough return to the active roster that included a pair of fundamental mistakes on a single decisive play, the Texas Rangers acknowledged that while the pitching prospect’s future remains bright, he needs more time in the minor leagues to polish off his game.