30 Zach Duke, RP

Nationals pitcher Zach Duke took the place of Ross Detwiler Monday in San Francisco. He didn't get any run support in the 8-0 loss, but things didn't go so well for Duke, either. 

Duke (0-1) took the defeat as he allowed four earned runs on seven hits and no walks spanning just 3 1/3 innings before giving way to Craig Stammen. He struck out just one and threw 58 pitches. 

The 30-year-old has made 10 appearances this season for Washington but this was his first as a starter. It is also likely his last for a while. His ERA is now at 8.84 on the year with a 1.80 WHIP. 

Nationals pitcher Zach Duke will move from the bullpen to the rotation Monday against the Giants, to replace Ross Detwiler for at least one turn. The team announced the move Saturday. 

Duke has an 8.40 ERA in 15 innings out of the bullpen this season and has not started since 2011, when he had a 5.47 ERA in nine starts for the Diamondbacks. 

The Nationals are reportedly leaning toward using Craig Stammen, not Zach Duke, in the event that Ross Detwiler cannot start Monday against the Giants. Detwiler is dealing with back spasms and seems likely to miss at least one start.

Duke has an 8.40 ERA on the season, and the team would rather use Stammen, who pitched Wednesday and would be in line to pitch on normal rest if he has to join the rotation, according to The Washington Post.