CLEVELAND -- Browns tight end Kellen Winslow remains hospitalized after suffering internal injuries and hurting his right shoulder and right knee in a motorcycle crash Sunday.

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Winslow Riding Motorcycle

A NewsChannel5 source said Winslow re-injured his right leg, with possible damage to his ACL.

Emergency room physicians at MetroHealth Medical Center said that the main concern for Winslow would be the internal injuries, which are potentially life-threatening.

Those injuries alone could keep a player out of the game for months longer than it would take a normal person to heal.

Winslow has already had two surgeries on his right leg from when he broke it last September, and any injury to his right knee is potentially very damaging.

The injuries to Winslow's knee and shoulder have the Browns concerned about his ability to play this season, ESPN.com reported.

The extent of the injury and the possibility of structural damage that might sideline him for an extended period would not be determined until swelling in the knee subsides, the report said.

Winslow crashed his motorcycle Sunday night in the parking lot of Cuyahoga Community College in Westlake. He hit a curb doing 35 mph.

SLIDESHOW: Winslow's Motorcycle Accident

He is being treated at the Cleveland Clinic by the team's medical staff, Browns spokesman Bill Bonsiewicz said.

Winslow, 21, is in his second year with the Browns.

NewsChannel5 sports director Chris Miller obtained a portion of the standard professional football player's contract, which mandates that a player shall not take part in any risky activity.

It reads, in part, that a "player will not engage in … any activity other than football which may involve a significant risk of personal injury. … Player therefore agrees that club will have the right … to enjoin the player from engaging in any activity other than football which may involve a significant risk of injury."

Winslow's contract includes language which is even more specific, expressly forbidding any type of extreme activities which include motorcycles, Miller reported.

According to a source knowledgeable about contracts, the Browns have three options. They can void the contract, which still has five years left on it.

A second option would be to restrictor the deal to make it more incentive-based, compared to proof or performance-based.

And thirdly, the Browns could recoup some of the bonus money Winslow has already collected.

The first-round draft pick missed nearly all of his rookie year after breaking his right leg against Dallas in Week 2.

Winslow's agent is expected in Cleveland Wednesday. He will be trying to figure out if the Browns have the right to recoup money they already paid his client since he was on a motorcycle. No formal meetings with the Browns is expected Wednesday.

NewsChannel5 and newsnet5.com will have the latest as information becomes available.