Lamar Odom -- I'm Going Back to Cali ... as a Clipper!

In a move that might revitalize both his basketball and his reality television career ... Lamar Odom is heading back to Los Angeles ... 'cause he's officially been picked up by the Clippers.

Odom was the main piece in a four-team trade that was finalized this afternoon. LO will be leaving the Dallas Mavericks, where he spent one absolutely terrible season.

Lamar is in the final year of his contract and will make $8.2 million this year.

This will be Odom's second stint with the Clip Squad ... he was drafted 4th overall by the team back in 1999. He later spent seven season with the Lakers.