"I feel good, but I want my mind to be 100 percent," the veteran said about the ultrasound. "Let's just hope it's not a hernia or something. That's what I'm worried about. Tomorrow will give me peace of mind. But as far as physically, today was a good day today. A lot better."
Burnett left Friday's start against the Marlins in the fifth inning because of soreness in his right groin. He threw a bullpen session Sunday morning at Citizens Bank Park and said it went better than expected, although he twice felt a pull in the muscle while throwing out of the stretch.
"It went away right after that," Burnett said. "I'm feeling good enough to throw."
If Burnett misses a start or more, the Phillies could use Triple-A right-hander David Buchanan, who pitched just one inning Sunday, which keeps him fresh should he be needed Wednesday. Buchanan is not on the 40-man roster, but the Phils made room on the roster Saturday when they outrighted right-hander Brad Lincoln to Lehigh Valley.