Pruitt is scheduled to start Friday's game against the Red Sox, Roger Mooney of the Tampa Bay Times reports.
Pruitt will step in for the injured Chris Archer (forearm), who won't be able to make his next start on schedule. Archer isn't expected to miss more than one start, so Pruitt will likely head back to a long-relief role following Friday's outing. The 28-year-old has compiled a serviceable 4.19 ERA and 1.14 WHIP in eight starts for the Rays this season.