Tigers manager A.J. Hinch said Alexander is expected to start Thursday's contest against the Blue Jays, Evan Woodbery of MLive.com reports.
Alexander will join the rotation as a replacement for Michael Pineda (triceps), who went on the 15-day injured list Sunday. The 28-year-old Alexander has produced a 4.05 ERA and 1.29 WHIP with 18 strikeouts over 33.1 innings in 14 appearances, including four starts with the Tigers this season. Hinch said that the team is taking it start-by-start with Alexander for now, making it possible that the lefty only makes one turn through the rotation before returning to the bullpen.