The Indianapolis Colts traded quarterback Mike Pagel to the Cleveland Browns yesterday and Colts Coach Rod Dowhower immediately named Gary Hogeboom his starter.

Pagel, who spent four seasons with the Colts, had a workout earlier with Cleveland as a prelude to the deal. It was reported that the Browns gave the Colts a seventh-round pick in the 1987 draft.

Pagel, who was a free agent, signed a one-year contract yesterday, said Ernie Accorsi, Cleveland's vice president for football operations. Pagel became expendable when the Colts obtained Hogeboom from Dallas and selected Illinois quarterback Jack Trudeau in the second round of the draft.

The departure of Pagel leaves the Colts with four quarterbacks -- Hogeboom, Trudeau, Matt Kopler and Blair Keil.

At Cleveland, Pagel will compete with Bernie Kosar, Gary Danielson, former starter Paul McDonald and rookie Mike Norseth . . .

The Dallas Cowboys signed USFL quarterback Reggie Collier to a four-year contract with an option. Collier was drafted by the Cowboys in the sixth round of the 1983 draft after he had signed with the USFL's Washington Federals, who moved to Orlando after the franchise was sold. . .

All-Pro defensive end Leonard Marshall walked out of the New York Giants' minicamp in a contract dispute. Marshall is in the final year of a four-year contract he signed in his rookie season. He reportedly earned $125,000 last season.

AUTO RACING

In Spa-Francorchamps, Belgium, the International Auto Sports Federation (FISA) announced emergency safety measures for Grand Prix racing, notably considerable engine power reductions, after the death last week of Italian driver Elio de Angelis.

FISA President Jean-Marie Balestre said cuts in engine power from the current limit of more than 1000 horsepower to around 600 horsepower would be "applied as soon as possible."

TENNIS

Ivan Lendl and Martina Navratilova, the top seeds, received favorable draws for the upcoming French Open. Should play go to form, Lendl would meet 16th-seeded Heinz Gunthardt in the round of 16 and No. 7 Anders Jarryd in the quarterfinals. If Lendl reaches the semifinals, his projected opponent would be fourth-seeded Yannick Noah.

In the other half of the draw, defending champion Mats Wilander, the second seed, is projected to meet No. 3 Boris Becker or fifth-seeded Stefan Edberg in the semifinals.

Steffi Graf and Hana Mandlikova went into the half of the draw headed by defending champion Chris Evert Lloyd. Graf, although only 16, is seeded third after she defeated both Evert and Navratilova within the past month.

BASKETBALL

Doug Collins became the Chicago Bulls' ninth head coach in the past 10 years and said he had no illusions about job security or doubts that he could turn the franchise around. He also has no experience as a head coach and, at 34, will be the league's youngest coach.

Collins succeeds Stan Albeck, who was fired last week, although he kept the injury-plagued club in contention long enough for Michael Jordan to return and lead a late-season surge that carried the Bulls into the playoffs.

The Chicago Tribune reported Collins signed a two-year contract worth about $225,000 a year, with an option the Bulls can exercise for a third year . . .

George Karl was named head coach of the Golden State Warriors by new owners Jim Fitzgerald and Dan Finnane. Karl, who was fired by the Cleveland Cavaliers in March after less than two seasons as coach, replaced John Bach.

HARNESS RACING

Driver David Dunckley, who was involved in a four-horse pileup at Roosevelt Raceway in Mineola, N.Y., May 16, died of injuries sustained in the accident, a track spokesman said. Dunckley, who underwent brain surgery the day after the accident, never regained consciousness after he went into a coma. He was 47.

LOCALLY

The Tournament Players Club at Avenel, which will be the home of the PGA Tour's Kemper Open next year, officially will open today in Potomac. Approximately 320 members, plus Deane Beman, PGA Tour commissioner, will play today and Sunday in an informal tournament . . .

Eddie Robinson, Grambling State football coach and athletic director, was honored in a "Celebrity Salute" at the Dirksen Senate Office Building by the Louisiana congressional delegation and the Washington chapter of Grambling alumni.

Robinson, 66, has been the football coach of the Tigers for 44 years. He holds the NCAA record for football coaching victories with 329, having passed the late Bear Bryant last season.

Robinson said that although he recently promised his wife Doris, who was present yesterday, that he would coach no more than five more years, "I like coaching, and if I can continue to compete with the younger coaches, and win on the football field, I see no reason to quit."

MISCELLANEOUS

A sportswriter was killed yesterday when he was struck in the head by a hammer thrown during the NCAA Division II track and field championships at Cal State-Los Angeles.

The "hammer" is a 16-pound steel ball attached to a handle by a wire.

Witnesses said Phil Klusman, 43, who had worked for the Bakersfield Californian for 21 years, was standing in an out-of-bounds area with Cal State-Bakersfield track coach Charlie Craig and assistant coach Bob Koons when an athlete misthrew the hammer on a competitive effort.