Mantiply is set to undergo arthroscopic surgery on his left knee, so the Blue Jays will stash him away on the 60-day IL and give his spot on the 40-man roster to Simeon Woods Richardson, who was acquired from the Twins on Wednesday.

Mantiply was originally expected to start up a throwing program soon, but after receiving a second opinion on his knee, he decided the best path forward would be to undergo a cleanup procedure. An updated timeline for his return will likely be available after the surgery, but manager John Schneider said the operation won't force the southpaw to miss the rest of the season.