Rocker will pitch in bulk relief behind opener Trevor Williams during Friday's game against the Rays, Jeff Wilson of AllDLLS.com reports.
Rocker has appeared in 26 games this season, 24 of which have been as a traditional starter. He's followed an opener twice and has experienced success in that capacity, going a season-high 7.2 innings against the Rockies at Coors Field back in May before covering five innings at Miami in June. In total, the right-hander has allowed just two runs on eight hits and three walks with 15 strikeouts across those 12.2 frames.