The Padres placed Canning (Achilles) on the 15-day injured list Wednesday.
Canning is still on the mend from the season-ending Achilles surgery he underwent last summer, but he was cleared to face hitters in a simulated game March 20 and struck out three over a scoreless inning. A clearer timeline for his return will emerge while he builds his workload, though he could return to San Diego's rotation before the end of April.