Answer
On June 1, 2018, during the first round of the 2018 Stanley Cup playoffs against the Pittsburgh Penguins, Couturier tore his medial collateral ligament (MCL) after a collision with Penguins defenseman Kris Letang. Couturier underwent surgery on June 2, and the Flyers announced that he would be out for the rest of the 2018 season.