Aaron Boone told reporters on Sunday that Stroman still felt discomfort in his left knee during a simulated game this week. The rule of thumb for pitchers is that for however long they are down with an injury, it takes them just as long to ramp up to return.

New York Yankees pitcher Marcus Stroman had a setback as he tries to return from a left knee injury that has sidelined him for the last month.

Stroman struggled in all three of his starts this season, and lasted just nine batters in his most recent start on April 11 before landing on the IL. On a rainy night in The Bronx against San Francisco, he allowed five runs on four hits and three walks in just 0.2 innings.