Los Angeles Lakers center DeMarcus Cousins suffered a torn ACL in his left knee, his agent Jeff Schwartz confirmed to ESPN's Adrian Voinarovsky.
There is no timeline for the operation, but the 2019-20 Cousins season is in jeopardy, Voinarovski notes.
The cousins were kneeling with another player while training in Las Vegas on Monday and had to leave the court, a source told Voinarovski.
The four-time All-Star was limited to 30 regular season games with the Golden State Warriors last season after a year-long dismissal of a torn left Achilles tendon, which he maintains in January 2018 while playing for the New Orleans Pelicans. The cousins then tore his left quad muscle in the Warriors' first-round playoff series against the Los Angeles Clippers in April.
The cousins, who turned 29 on Tuesday, signed a one-year deal with the Lakers in July for just over the minimum veteran.