Track and Field: Usain Bolt returned to the site of his last Olympic triumph, recovering from a slow start to win the 100 meters Friday night in the Anniversary Games at London in his best time this season.
The world’s fastest man failed to leave the blocks promptly, but powered through the field at the Diamond League meet. He finished in 9.85 seconds at the stadium where he won three gold medals last year in the London Games.
American Michael Rodgers was second in 9.98, and Jamaica’s Nesta Carter was third.
• Gay failed more tests: Sprinter Tyson Gay failed more than one drug test this year, recording one of his positives at the U.S. championships in June, where he won the 100 and 200 meters.
Earlier this month, Gay revealed he had tested positive in an out-of-competition test he took May 16.
Mahan leads by two at Canadian Open
Golf: Hunter Mahan birdied the final three holes for an 8-under 64 and a two-stroke lead after the second round of the Canadian Open at Oakville, Ontario.
Mahan had eight birdies in his bogey-free round at Glen Abbey to reach 13-under 131.
John Merrick was second after a 62, tying the course record set by Leonard Thompson in 1981.
• Wiebe, Langer in lead at British Seniors: Mark Wiebe of the United States shot a 5-under 65 to share the lead with Bernhard Langer after the second round of the Senior British Open at Royal Birkdale in Southport, England.
Langer shot a 67 and made five birdies. Both players finished at 5-under 135.
• Knox shoots 59: Russell Knox shot the fifth 59 in Web.com Tour history, missing a chance to break the tour record when he settled for pars on the final two holes in the second round of the Boise Open.
The 28-year-old Scot had two eagles and eight birdies in his bogey-free round at 6,807-yard, par-71 Hillcrest Country Club. He leads by one at 13 over after an opening 69 on Thursday.
• Abe on verge of history: Lakareber Abe moved into position to become the first black female player to win a U.S. Golf Association individual championship, winning two matches to advance to the 36-hole final in the U.S. Girls’ Junior Championship in Fort Wayne, Ind. She will face Gabriella Than, a 17-year old from Upland, Calif.
• Scheffler, Davis reach final: Scottie Scheffler and Davis Riley won quarterfinal and semifinal matches at Martis Camp Club in Truckee, Calif., to advance to the 36-hole final in the U.S. Junior Amateur.
Blackhawks extend coach Quenneville
Hockey: The Chicago Blackhawks and coach Joel Quenneville have agreed to a three-year contract extension that keeps him with the Stanley Cup champions through the 2016-17 season.
Quenneville’s deal was set to expire after the upcoming season.
• Ducks re-sign Palmieri: Right wing Kyle Palmieri has re-signed with the Anaheim Ducks, agreeing to a three-year deal worth $4.4 million.
• Blues save goalie: St. Louis Blues goalie Jake Allen has signed a two-year-contract after his strong showing as a rookie.
Isner advances to Atlanta semifinals
Miscellany: Top-seeded John Isner advanced to his fourth straight Atlanta Open semifinal berth, beating James Blake 7-6 (1), 7-6 (5).
Isner will face seventh-seeded Lleyton Hewitt, who beat third-seeded Ivan Dodig of Croatia 1-6, 6-3, 6-0.
• Chong wins third gold: He Chong won his record-tying third consecutive world title in the men’s 3-meter springboard, giving China its seventh gold medal in eight diving events at Barcelona, Spain.
• Hernandez associate held on bail: A man prosecutors say was with Aaron Hernandez the night the former New England Patriots tight end’s friend was killed has been held on $500,000 cash bail.
Ernest Wallace appeared in Attleboro District Court on a charge of being an accessory to murder.
• Gonzaga freshman stars in loss: Gonzaga University women’s basketball incoming freshman Emma Wolfram and the Canadian Junior Women’s National Team fell to undefeated Spain 80-62 at the FIBA U-19 World Championship for Women at Klaipeda, Lithuania.
Wolfram led Canada with 13 points and had six rebounds.