TAMPA - This is corrective, but not punitive. On Wednesday, in the most critical moment of his return to the Rangers’ rotation, Kumar Rocker failed to properly cover first base, failed to realize that another runner was still circling the bases and failed to show up afterwards to explain where everything went wrong.

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. Rocker's last start was on Wednesday against the Rays,

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