The Texas Rangers fell 4-3 to the Tampa Bay Rays on Thursday, to suffer their third straight loss and a series sweep after optioning Kumar Rocker 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.