With a runner on second and the game tied at 4, Tracy hit Kris Medlen's 1-0 pitch into the gap in left-center field for a double, scoring Ian Desmond. It was Tracy's Major League-leading ninth pinch-hit RBI of the season. But Tracy came up hobbling while running to second base.
Athletic trainer Lee Kuntz immediately came to Tracy's aid. A couple of minutes later, Tracy left the game. Tracy is expected to have an MRI on Sunday to determine how serious the injury is.
"I'm pretty sore right now. We'll see what happens tomorrow," Tracy said.
The Nationals are not sure if Tracy will go on the disabled list. They are hoping that he simply broke scar tissue after having surgery for a double sports hernia during the offseason.
"He is hoping he just popped some scar tissue, and he also talked to his doctor," Johnson said. "He said that he would wait a couple of days to see if that is the case. I hate to overreact and make a rush to make a roster move. Maybe he is going to be all right in two to three days."