The Nationals' bullpen has been an ever-changing unit so far this season, with 16 different relievers used in only two months.
Monday night's game between the Nationals and Blue Jays has been postponed. The two teams will play a doubleheader on Tuesday.
Nationals pitchers Doug Fister and Sammy Solis each threw bullpen sessions at Nats Park for the first time in their respective rehabs.
Anthony Rendon returned from his rehab assignment to Nats Park on Monday, while Denard Span was held out of the lineup.
Joey Votto technically broke a rule against the Nationals and got a free base in the process -- but nobody seemed to notice.