SAINT-ETIENNE, France — Alexander Kristoff of Norway, in a solo show of opportunistic racing, won the 12th stage of the Tour de France in a sprint as Vincenzo Nibali kept the yellow jersey for a 10th day.

After hitching a ride behind the back wheel of Italian sprinter Matteo Trentin, Kristoff powered out of the barreling pack and beat Peter Sagan of Slovakia, who was second, by nearly a bike length, while Arnaud Demare of France was third. The pack overtook a pair of breakaway riders with less than seven kilometers left.

LOS ANGELES — Carlos Boozer is headed to the Lakers' crowded frontcourt after Los Angeles made the winning bid for the veteran forward waived by the Chicago Bulls via the amnesty clause.The Lakers made the highest bid under the NBA's modified waiver process for players who were amnestied, the team announced.According to NBA rules, teams with room under the salary cap had to bid at least $1.4 million, the amount of the minimum salary for veterans next season. Details of the winning bid were not provided, though ESPN.com reported that it was $3.25 million.

DALLAS — The Dallas Mavericks have re-signed guard Devin Harris.The Mavericks didn't reveal contract terms in their announcement. ESPN reported Harris got a $16.5 million, four-year deal.The 31-year-old Harris averaged 7.9 points, 4.5 assists and 20.5 minutes in 40 regular-season games after returning from the injury.

SANTA CLARA, Calif. — San Francisco 49ers CEO Jed York got a little teary on his drive to Levi’s Stadium. His voice cracked while talking about taking his young son to games at the stadium for years to come.With confetti streaming down under a blue sky, the 49ers officially opened the $1.2 billion stadium in Santa Clara with a ribbon-cutting ceremony complete with all the opulence of their new home.NFL Commissioner Roger Goodell, 49ers coach Jim Harbaugh, linebacker Patrick Willis and left tackle Joe Staley joined York and others on stage to cut the ribbons.The stadium’s opening put one of the NFL’s flagship franchises on firm footing and planted the country’s most popular sports league in technology-rich Silicon Valley for the first time.