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Jorge De La Rosa's season appears to be over after the Colorado Rockies left-hander tore a ligament in his pitching elbow.

De La Rosa left Tuesday's game against Arizona in the third inning with soreness in his left elbow and went to the hospital for an MRI.

About an hour after the Rockies' 12-4 win in the opener of a day-night doubleheader, the Rockies tweeted, "Jorge De La Rosa suffered a complete tear of his ulnar collateral ligament in his left elbow. The next step is being discussed."

That likely means Tommy John surgery that would sideline the hard-throwing lefty for at least a year.

De La Rosa was the Rockies' top pitcher so far with a 5-2 record and a 3.51 ERA. He was coming off his first career complete game when he got hurt.

Dodgers face suit

The family of a San Francisco Giants fan who was brutally beaten at Dodger Stadium in March sued the team and its troubled owner Frank McCourt on Tuesday, claiming security cutbacks were partially to blame for the attack. The suit was filed in Los Angeles Superior Court on behalf of Bryan Stow contends the Dodgers were negligent by not providing more security and not having adequate lighting in the parking lot where the attack occurred.

Meantime, the lawyer for the man suspected in the beating says his client never went to the game that day. Chip Matthews, who is representing Giovanni Ramirez, told said Tuesday that his client is willing to take a polygraph test to show he was not at the stadium.