Running back Sammy Winder of the Denver Broncos underwent an emergency appendectomy early yesterday in Denver and is expected to be out four to six weeks.

Last year, Winder rushed for 1,153 yards -- third in the AFC -- and set a team record for number of carries in a season with 296.

The team also lost veteran lost tight end John Sawyer with a broken left hand. Sawyer broke his left hand Saturday when it got caught in a player's jersey. Sawyer, the Broncos' starting H-back at the beginning of last season, reported to camp last week with a broken right hand suffered in a bathtub accident.

* Dolphins: Veteran backup quarterback Don Strock reached agreement on a two-year contract as starter Dan Marino's holdout continued. Marino walked out of camp Thursday, complaining that the renegotiation of his contract was moving too slowly. He has been in his hometown of Pittsburgh since Friday.

* Chargers: San Diego announced the signing of its No. 1 draft pick, offensive lineman Jim Lachey of Ohio State. Lachey, 6 feet 6 and 280 pounds, was the 12th player chosen in the draft.

* Raiders: Starting left guard Curt Marsh suffered a broken arm and will be out for at least six weeks. Marsh, 25, broke the bone between the elbow and shoulder in his right arm while blocking on a running play.

* Cowboys: Running back Tony Dorsett, who is having problems with the Internal Revenue Service, called club President Tex Schramm Saturday night and said he wasn't reporting to training camp despite a $1,000-per-day fine. Dorsett told Schramm he will meet with the IRS today and Tuesday.

* 49ers: Running back Wendell Tyler denied he had signed a three-year, $3-million contract with the USFL Tampa Bay Bandits to go into effect at the end of this NFL season. Tyler said he and agent Howard Daniels were "in negotiations with the 49ers and I am looking forward to being an asset to this championship organization."

* Cardinals: Citing age and past injuries, guard Terry Stieve, 31, announced he would retire immediately. Stieve is a nine-year veteran.