Tracy injured his right leg while running the bases in last night's win over the Braves.
The demoted starter is now rumored to be trade bait for a veteran relief pitcher.
Ross Detwiler is headed back to the bullpen as Chien-Ming Wang will get his chance as the fifth starter.
Bryce Harper homered and Danny Espinosa added a three-run shot to help Washington strengthen its hold on first place in the NL East
Both an MLB.com columnist and Chipper Jones agree the Nats are legitimate because of their pitching.