Matt Garza's start has been moved up and he will pitch on Monday. The Rangers are undecided on their Tuesday starter. It could come from a group of long reliever Ross Wolf and Triple-A starters Josh Lindblom and Travis Blackley.
Ogando could only miss one start. The Rangers are in wait-and-see mode and haven't decided yet if he'll return to the rotation or the bullpen.
"It's premature," Rangers manager Ron Washington said when asked if Ogando will return as a starter.
Ogando has been on the disabled list twice this season after moving back into the rotation from the bullpen.
He was on the 15-day DL from June 6 to July 23. He's 1-2 with a 4.68 ERA in five starts since coming back.
Ogando has inflammation in a nerve near his right shoulder. His CT scan was sent to Dr. James Andrews for a second opinion Friday.
Right-hander Nick Tepesch, who opened the season in the Rangers' rotation, isn't a candidate to help the Rangers immediately. He threw 25 pitches in a bullpen session and will throw another on Monday.
Tepesch isn't expected back until September. He is 4-6 with a 4.85 ERA for 16 starts. He was put on the DL on July 7 with right elbow inflammation.