A Roundup Of The Week March 16-22

HORSE RACING—SUN CATCHER ($5.40), Alonzo Guajardo up, defeated Prince Majestic by a length to win the $168,050 New Orleans Handicap at Fair Grounds. The 4-year-old ran the 1� miles in 2:03[2/5].

Nell's Briquette ($10.20), ridden by Bill Shoemaker, beat Bee a Scout by three-quarters of a length to win the $138,800 Santa Susana Stakes at Santa Anita. The 3-year-old filly covered the 1[1/16]th miles in 1:42[4/5].

MOTOR SPORTS—The team of HURLEY HAYWOOD, BRUCE LEVEN and AL HOLBERT, averaging 106.044 mph over the 5.2-mile course, won the 12 Hours of Sebring ( Fla.) endurance race in a Porsche Turbo.

SWIMMING—TEXAS won the AIAW championship in Columbia, S.C., defeating Stanford 587.5 to 545.5 on the strength of five firsts by the Longhorns' Jill Sterkel—the most ever at the AIAW meet. Two of her times, 22:41 in the 50-yard free and 53.10 in the 100-yard butterfly, were good for American records. STANFORD set U.S. women's marks in the 200- and 400-yard freestyle relays, with times of 1:31.12 and 3:19.70, respectively, and NORTH CAROLINA swam the 200-yard medley relay in a record 1:42.63.

TENNIS—JIMMY CONNORS defeated Gene Mayer 6-1, 2-6, 6-2 to win a $175,000 tournament in Rotterdam.

Chris Evert Lloyd beat Mima Jausovec 6-4, 6-4 to win a $150,000 tournament in Boston.

TRACK & FIELD—WILLIE BANKS set an American triple jump record of 56'7�" in Los Angeles, surpassing the mark of 56'6�" set by James Butts in 1978.

MILEPOSTS—CLEARED: By a jury in Maricopa County ( Ariz.) Superior Court, former Arizona State Football Coach FRANK KUSH, 52; of claims of battery against and misrepresentation of a scholarship situation to former Sun Devil player Kevin Rutledge.

NAMED: As coach of the New Jersey Nets, effective at the end of this season, LARRY BROWN, 40, who guided UCLA to a 42-17 record over the last two seasons, to replace Bob MacKinnon, who will become the Nets' general manager. Bruins Assistant LARRY FARMER, 30, was named as Brown's successor at UCLA.

RETIRED: As of the end of this season, Center WES UNSELD, 35, after leading the Baltimore, Capital and Washington Bullets to the playoffs in 12 of his 13 seasons with the team and to the NBA championship in 1977-78. Unseld, who was the league's MVP and Rookie of the Year in 1968-69, has been offered a vice-presidency of the Bullets and Capital Centre.