Todd Gurley has arthritis in his left knee.
Gurley underwent an ACL repair in 2014.
The Los Angeles Rams used Gurley sparingly during the playoffs. The Rams have not commented on Gurley's reported diagnosis or potential treatments.
Gurley finished the season with 1,251 yards on 256 attempts and an additional 580 yards on 59 receptions for 21 total touchdowns.