ARLINGTON -- Left-hander Robbie Ross Jr. is continuing to struggle at Triple-A Round Rock since being sent down by the Rangers.
Ross allowed nine runs in 2 1/3 innings against Colorado Springs on Wednesday and has a 10.54 ERA in four games. In 13 2/3 innings, he has allowed 17 hits, including four home runs, walked 11 and struck out 12.
"He is having a hard time with his fastball command," Rangers Minor League pitching coordinator Danny Clark said. "He is getting the middle of the plate and has lost the deception on his fastball."
The Rangers optioned Ross to Round Rock on June 17 after he went 2-4 with a 5.61 ERA in nine starts and nine relief appearances at the Major League level. Manager Ron Washington said the club isn't going to bring Ross back until he gets his command issues straightened out.
T.R. Sullivan is a reporter for MLB.com Read his blog, Postcards from Elysian Fields and follow him on Twitter @Sullivan_Ranger. Grace Raynor is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.