Rasmussen will start Game 3 of the ALDS against the Red Sox on Sunday, Marc Topkin of the Tampa Bay Times reports.
Heading into the postseason, the Rays were undecided whether Rasmussen would be used as a starter or as a reliever, but he'll take the mound to begin Game 3 after he didn't appear out of the bullpen in either of the first two contests. The right-hander lasted five innings in each of his final four regular-season appearances, and he posted a 1.35 ERA and 0.75 WHIP in 20 innings during that time.