Treinen gave up three runs (none earned) on seven hits with two strikeouts over five innings in his first Major League start on May 6 against the Dodgers. The Nationals lost that game, 8-3. Treinen's next start was on May 22 against the Pirates, and he surrendered two earned runs on four hits with five walks over 5 2/3 innings in a 3-1 loss.
Treinen is a 0-2 with a 1.40 ERA in 19 1/3 innings this season. His next start will be in San Diego on Saturday night.
"He'll be ready for that," manager Matt Williams said.
Daniel Popper is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.