ARENA FOOTBALL—The DENVER DYNAMITE won Arena Bowl '87 by routing the Pittsburgh Gladiators 45-16 before 12,232 in Pittsburgh. Denver quarterback Whit Taylor threw four touchdown passes, including three to wide receiver Gary Mullen, the game's MVP.
BOXING—WBC and WBA titleholder MIKE TYSON claimed the undisputed heavyweight crown with a 12-round unanimous decision over IBF champ Tony Tucker, in Las Vegas (page 20).
Brian Mitchell of South Africa successfully defended his WBA junior lightweight title with a 14th-round TKO of Francisco (Rocky) Fernandez of Panama, in Panama City.
Antonio Esparragoza of Venezuela retained the WBA featherweight championship with a 10th-round KO of Pascual Aranda of the United States, in Houston.
DIVING—At the U.S. outdoor championships in Bartlesville, Okla., which determined the qualifiers for the Pan American Games team, GREG LOUGANIS raised his string of national titles to 43 with victories in the 10-meter platform and the 3-meter springboard, MARY ELLEN CLARK upset defending champion Michele Mitchell to win the women's 10-meter platform and KELLY McCORMICK won the women's 3-meter springboard.
GOLF—LAURA DAVIES shot a one-under-par 71 to defeat Ayako Okamoto and JoAnne Carner in an 18-hole playoff and win the U.S. Women's Open and $55,000, in Plainfield, N.J. (page 66).
Curtis Strange earned the $130,328 first prize at the PGA St. Jude Classic in Memphis, shooting a final-round three-under-par 69 for a 72-hole total of 275, 13 under par. Strange finished one stroke in front of four competitors.
Chris Johnson won the LPGA Columbia Savings Pro-Am and $37,500 in Englewood, Colo., by shooting a final-round two-under-par 70 for a 72-hole 277, 11 under par. She beat Shirley Furlong by five strokes.
Alison Nicholas won the Ladies' British Open, at St. Mellion, shooting a final-round even-par 73 for a 72-hole total of 296, four over par. She defeated Laura Davies and Muffin Spencer-Devlin by one stroke to claim the $24,000 winner's check.
HORSE RACING—BET TWICE ($4.60), with Craig Perret up, won the Haskell Invitational Handicap for 3-year-olds at Monmouth Park by a neck over Alysheba. Bet Twice covered 1? miles in a stakes-record-tying 1:47 to earn a $300,000 winner's purse and increase his career earnings to more than $2.6 million (page 36).