O'Flaherty (shoulder) began his rehab assignment at Triple-A Nashville on Wednesday. He gave up two hits during a scoreless inning of relief. The Athletics will likely have O'Flaherty one or two more times for Nashville before returning from the DL. O'Flaherty was 0-2 with an 11.57 ERA and 7:5 K:BB ratio over seven innings prior to being diagnosed with a shoulder strain.