HOUSTON -- Former National League MVP Ken Caminiti allegedly violated probation by using cocaine, and a warrant was issued Friday for his arrest.

A urine sample he gave Monday showed he had used the drug, according to the warrant.

The 39-year-old Caminiti pleaded guilty to cocaine possession in March 2002. He entered a three-year community supervision agreement, meaning the conviction would not be on his record if he met the terms of the deal.

The request to revoke the probation was filed in state district court in Houston.

"We'll go to court Monday, he'll turn himself in and we'll post bond," Caminiti's lawyer, Kent Schaffer, said Friday. "Then we'll respond to the allegations. I haven't had a chance to look at the state's evidence or confer with Ken about it."

Caminiti and two other men were arrested Nov. 14, 2001, after Harris County Sheriff's Department deputies said they found them in a southwest Houston motel room with drugs and drug paraphernalia. Caminiti was charged with possession of less than a gram of cocaine.

At his sentencing 10 months ago, State District Judge Bill Harmon ordered Caminiti to receive counseling three times a week, speak to students about drugs, continue attending Alcoholics Anonymous meetings and submit to periodic urinalysis. The judge also slapped him with a $2,000 fine.

Caminiti was promoted from the Houston Astros' minor league system in 1987 and became a star before a 1994 trade to San Diego. He was the National League's MVP in 1996 with the Padres, hitting 40 homers and driving in 130 runs.

He returned to the Astros in 1999, before winding up his major league career with the Texas Rangers and Atlanta Braves in 2001.

He raised a furor last summer when he was quoted in Sports Illustrated saying half of major league baseball players use steroids and that he used the performance enhancing drugs during his MVP year. Caminiti later scaled back his assertions, saying he was aware of only a few players taking the drugs.