Yarbrough is expected to work as a bulk reliever behind opener Collin McHugh in Monday's game against the Blue Jays in Toronto, Marc Topkin of the Tampa Bay Times reports.
After Yarbrough was pummeled for seven runs over two innings while working as a traditional starter his last time out Sept. 6 in Boston, manager Kevin Cash will see if the lefty can deliver better results while working out of the bullpen. Though he won't necessarily be the first pitcher out of the bullpen once McHugh exits, Yarbrough projects to cover the most innings of any Rays arm and is thus the most likely candidate to factor into any decision.