Mixed martial arts

UFC champ flagged for another failed doping test — Jon Jones could face a lengthy suspension from mixed martial arts after the UFC light heavyweight champion was notified Tuesday of his second potential violation of the promotion’s anti-doping policy. Jones is widely considered the top pound-for-pound fighter in his sport. The potential violation stems from a sample collected after his weigh-in July 28 for his title fight against Daniel Cormier at UFC 214 in Anaheim, California.

Football

49ers assistant is NFL’s first openly LGBT coach — Katie Sowers is not only the first female ever on the San Francisco 49ers coaching staff, she is also the NFL’s first openly LGBT coach, male or female. “There are so many people who identify as LGBT in the NFL, as in any business, that do not feel comfortable being public about their sexual orientation,” Sowers told Outsports.com. “The more we can create an environment that welcomes all types of people, no matter their race, gender, sexual orientation, religion, the more we can help ease the pain and burden that many carry every day.” Sowers, 31, joined the 49ers this summer as an intern in the Bill Walsh NFL Diversity Fellowship program, and she was retained last week on coach Kyle Shanahan’s staff as a full-time offensive assistant, mostly working with wide receivers. Shanahan, in an interview with the (San Jose, Calif.) Mercury News earlier this month, said of Sowers’ pioneering presence: “It would be an issue if you felt like she was in there and you had to be careful what you said, or, ‘Oh there’s a female in there. Don’t swear.’ Katie hangs out. She’s one of the coaches.”

BASEBALL

Ducks extend Horton through 2020 — Oregon announced Tuesday a contract extension for head baseball coach George Horton that will run through June 30, 2020. Horton, 63, will enter his 10th season in Eugene in 2017-18. In his nine seasons at Oregon, he has resurrected a dormant baseball program and compiled an overall record of 320-220-1 while guiding the Ducks to the postseason five times.

CYCLING

Trentin, Froome sprint to finish at Vuelta — Matteo Trentin of Italy won a sprint finish to claim the fourth stage of the Spanish Vuelta on Tuesday, while Chris Froome maintained his overall race lead. Trentin powered past Juan Jose Lobato and had time to lift his arms in victory as he crossed the finish line of the 123-mile flat ride from Andorra to the coastal city of Tarragona. The 28-year-old Trentin has now won stages at all three Grand Tours, with two stage wins on the Tour de France and one at the Giro d’Italia.

— From wire reports