Clarke (1-1) allowed an unearned run on two hits and no walks in a third of an inning to take the loss against the Phillies on Friday.
Clarke forced a fielder's choice to begin the 11th inning Friday, but he gave up a pair of singles and was charged with his first loss of the season as a result. The right-hander has made 10 relief appearances since he was reinstated from the 10-day injured list in early August, and he's recorded an 8.22 ERA and 2.22 WHIP in 7.2 innings during that time.