The A's optioned Opening Day starter Kendall Graveman to Triple-A Nashville Thursday, along with fellow RHP Chris Bassit. In a corresponding move, newly acquired RHP Wilmer Font was activated to the 25-man roster.
Graveman struggled mightily in his six starts this season, going 0-5 with an 8.89 ERA. His five losses lead the major leagues, as do his 28 runs and 41 hits allowed.
The 27-year-old earned his first quality start of the season Wednesday night at Texas, allowing three runs in six innings, but still took the loss. Last season, Graveman went 6-4 with a 4.