The Texas Rangers sent starting pitcher Kumar Rocker back to the minor leagues earlier this week and he has a list of things to work on.

The Texas Rangers optioned right-hander Kumar Rocker to Triple-A Round Rock on Thursday, a day after a rocky start after coming off the injured list.

Rocker, 25, has not had a runner caught stealing while he’s on the mound. They are 6 for 6, including a stolen base in that messy third inning. The Rangers have worked with trying to get him to vary and speed up his delivery times with the pitch.