Bruney, who pitched only once since being activated last Tuesday from the DL, played catch Monday before the Yankees' 11-1 victory over the Texas Rangers. Bruney said his arm doesn't feel right.
"A week off here, week off there, it's not really fair to the bullpen," Bruney said. "I've got to find out what the problem is and at least get it diagnosed."
Bruney is to be examined Wednesday by Dr. James Andrews, Yankees spokesman Jason Zillo said.
The Yankees plan to recall right-handed reliever David Robertson from Triple-A Scranton/Wilkes-Barre and have him for Tuesday's game. Robertson was traveling to Texas on Monday night.
Girardi said MRI results on Bruney's elbow showed no structural damage.
"If I knew there was something seriously structurally wrong, I'd be more concerned," Girardi said. "But he's not where he needs to be, which is bad. I don't know what to make of it. Maybe he needs a couple more weeks rest and he'll be fine."
Bruney has been the Yankees' primary eighth-inning pitcher and setup man for Mariano Rivera when healthy. He is 2-0 with a 3.00 ERA in 10 appearances, but has pitched only once since April 21. He threw a perfect eighth inning last Tuesday against Oakland.