Seymour is expected to pitch in bulk relief behind opener Casey Legumina in Thursday's game against the Royals, Ryan Bass of Rays.tv reports.
Seymour made a five-inning start against the Nationals his last time out Saturday, but he'll be deployed out of the bullpen for his upcoming turn through the rotation. Since settling in as the Rays' de facto No. 5 starter June 8, Seymour has gone 0-1 with a 4.38 ERA, 1.14 WHIP and 12:4 K:BB in 12.1 innings over three appearances.