The New England Patriots are the subject of separate investigations requested by NFL Commissioner Pete Rozelle into drug use by players and an attempt to obtain a loan for the company that manages Sullivan Stadium, the Boston Globe reported. The investigations are being conducted by NFL Security Director Warren Welch.

Drug use among Patriots players was reported by the Globe after the team lost the Super Bowl to the Chicago Bears.

The background check was requested on Phil Molina. He was not otherwise identified, but reportedly is trying to obtain a loan for Stadium Management Co., which Patriots Vice President Chuck Sullivan owns, from the Central State Teamsters Union . . .

The agent for Richard Dent, all-pro defensive lineman of the Bears, met with Jerry Argovitz, president of the U.S. Football League's New Jersey Generals. Dent, the most valuable player in Super Bowl XX, has been attempting to renegotiate his Bears contract. But that contract has an option year remaining and Argovitz said he was not interested in signing Dent now to a future contract . . .

The Bears were told cornerback Leslie Frazier and wide receiver Dennis McKinnon will miss next season. Frazier, who was injured in the Super Bowl, had surgery for ligament damage on his left knee Feb. 3. McKinnon had arthroscopic knee surgery Feb. 11 . . .

Dallas Cowboys defensive tackle Randy White had bits of cartilage removed from his knees in an outpatient procedure. Doctors said his play should not be affected.