Diekman tossed a scoreless seventh inning and struck out a batter in Saturday's 7-4 loss to the Angels in 10 innings.
Manager Jeff Banister has wasted no time working Diekman back into high-leverage duties out of the bullpen since the lefty was activated from the 60-day disabled list Friday after having been sidelined all season following three surgeries to address ulcerative colitis. Diekman has picked up holds in back-to-back contests with a pair of perfect innings, and could settle in as the primary setup man to closer Alex Claudio with Jose Leclerc and Ricardo Rodriguez having struggled in recent appearances.