In an MCL injury, there is pain on the inside of the knee, and depending on the severity the knee could feel unstable. They are injuries often seen in professional sport. The damage is caused when the knee is pushed inwards and towards the other knee, which can happen if there is a direct blow to the outside of the leg.

Panthers captain Aleksander Barkov is expected to miss seven to nine months after having surgery to address ACL and MCL injuries to his right knee, the team announced.

Broncos OL Matt Peart suffered a serious knee injury early in Sunday's game against the Jets, but he went on to play every snap on offense.