Lamar Odom just can't seem to keep it together when it comes to his basketball career!

The former NBA star signed a one-year contract with the New York Knicks four months ago, and the troubled athlete has already been cut by the team.

“He just stopped showing up for meetings,” a source tells Life & Style. “I don’t believe Lamar has a cell phone. It’s impossible to get a hold of him ... He would disappear for days and even weeks at a time, and nobody would be able to get in touch with him. It was so unprofessional!”

Lamar started off with the Los Angeles Clippers in 1999 (he played with them until 2003), he was with the Lakers from 2004-2011, and he came back to the Clippers for the 2012-2013 season after playing with the Dallas Mavericks in 2011. Back in February he signed a two-month deal with the Spanish basketball team Laboral Kutxa, and while it seemed like he was getting back on track, it doesn't sound like he'll be making a big comeback anytime soon.

Last year Lamar and wife Khloe Kardashian split after rumors of cheating and drug use surfaced, and after that he got a DUI. Khloe filed for divorce and legally changed her last name back to Kardashian in December 2013, and though he's proclaimed that she will "always be my wife," she's since moved on with rapper French Montana.