A former defensive lineman for the Los Angeles Raiders and the Cleveland Browns pleaded guilty yesterday to helping his live-in girlfriend run a high-end prostitution ring out of his parents' Monroeville home.

Three other defendants face charges this month in connection with the prostitution and drug ring investigators say was run by the ball player's girlfriend, Amy Schifano.

After kissing his mother and hustling his parents out of the courtroom, a subdued John Robert "Buck" Buczkowski, 43, stepped forward and pleaded to two counts of promoting prostitution, six counts of possessing and dealing cocaine, and one count each of participating in a corrupt organization, conspiracy, dealing in the proceeds of an illegal activity and illegal use of a cell phone.

He faced a sentence of 43¹/₂ to 87 years had he gone to trial. Instead, he agreed to testify against his co-defendants if they proceed to trial.

After a short-lived career in the NFL, the former Gateway and University of Pittsburgh football star bought the Gold Rush restaurant and bar in Monroeville and ran it with his parents.

An investigation by the state attorney general's bureau of narcotics discovered another business he was helping run. In the fall of 2005, Mr. Buczkowski and seven other individuals, including his parents, were arrested for helping run an escort service called BAG (Boys and Girls) Enterprises Inc.

The business advertised in the City Paper and set up appointments on three cell phones. Customers paid by cash or credit card, with services averaging between $150 and $200 per appointment.

Mr. Buczkowski's parents do not face charges. They cooperated with authorities, helping them assess the scope of the $1 million operation, including credit-card transactions billed from their home. Five alleged prostitutes also agreed to cooperate.

Ms. Schifano, 31, faces the steepest penalties for drug dealing, promoting prostitution and other charges.

John W. Bogovich, 35, is charged with supplying the prostitutes and their customers drugs . Leonard R. Rini, 31, is charged with helping in all aspects of the business.

Mr. Buczkowski's sentencing is set for Sept. 5.