The Nationals recalled pitcher A.J. Cole from Triple A Syracuse to take Fister's spot on the roster.
In seven starts this season, Fister was 2–2 with a 4.31 ERA and 18 strikeouts in 39 2/3 innings. In his most recent start on Thursday, the 31-year-old gave up seven earned runs in two innings against the San Diego Padres.
Cole, a fourth-round draft pick in 2010, was ranked by Baseball America as Washington's No. 6 prospect heading into the season. He was recalled by the Nationals in late April and made his MLB debut on April 28, giving up nine runs (four earned) in two innings before being sent back to Triple A.
The Nationals (19–17) play in San Diego on Friday.
- Molly Geary