It's been well documented that San Jose Sharks centerman Joe Thornton was dealing with knee injuries this season, but we are finally learning just how banged up he was.

The longtime Shark suffered both an MCL and ACL tear in his right knee, according to Paul Gackle of Bay Area News Group. They were the exact same injuries he dealt with in his opposite knee a season before.

Thornton's extended absence from the Sharks' lineup began Jan. 23, forcing him to sit out San Jose's final 35 regular-season games. The injured knee also kept him sidelined for the entire playoffs.

The 38-year-old inked a one-year, $8-million deal last July. He went on to register 13 goals and 23 assists in 47 games this season.