The Rays designated righty Rob Delaney for assignment to open a 40-man roster spot for top prospect Matt Moore, reports Marc Topkin of the St. Petersburg Times.
Delaney, 27, spent most of the year at Triple-A. There he posted a 1.86 ERA, 7.6 K/9, 2.3 BB/9, and 0.4 HR/9 in 67 2/3 relief innings. He'd been designated and outrighted in May, but was re-added to the 40-man roster in July.
Moore, meanwhile, is the consensus best pitching prospect in the minor leagues. The 22-year-old southpaw has won back-to-back minor league strikeout crowns, whiffing 210 across 155 innings at Double and Triple-A this year. Moore's electric arm makes for an exciting bullpen addition to a surging Rays team that now sits 3.5 games back of the Red Sox in the wild card standings.