We're told Klein blew well over a .20 when he was arrested on the 101 Freeway in Los Angeles this morning -- his second DUI bust in the last 6 years. The legal limit in California is .08.
As we previously reported, Klein wasn't the only passenger in his car -- cops found a dog inside the vehicle. The dog was later retrieved by a friend of Klein's.
Klein's reps have not returned our calls.
UPDATE: Klein's bail has been set at $25,000