PHOENIX - Oakland Athletics closer Grant Balfour had arthroscopic surgery on his right knee to repair a torn meniscus.
Dr. Douglas Freedberg operated Thursday. The A's said recovery time usually is four to six weeks and Balfour decided to have the procedure now with the hope of returning for the start of the season. The injury is considered minor.
Balfour said through the team that the knee bothered him late last season but wasn't considered anything serious and that the knee calmed down during the offseason. So, he went about his regular regimen over the winter. The 35-year-old Balfour went 3-2 with a 2.53 ERA and 24 saves last season for the AL West champions.
NASCAR likely to require concussion tests
DAYTONA BEACH, Fla. - NASCAR will likely require baseline concussion tests for all drivers in 2014.
Steve O'Donnell, NASCAR's senior vice president of racing operations, said officials have also urged drivers to get an ImPACT test before this season.
"We've encouraged them all to get that, with the emphasis that in 2014 that almost likely will be mandated for all of them," O'Donnell said Thursday at Daytona International Speedway.
Four-time Cup champion Jeff Gordon voluntarily took the test and says all drivers should complete one even if it's not mandatory.
Serena could become oldest No. 1
DOHA, Qatar - Serena Williams moved with a victory of becoming the oldest top-ranked women's player, sweeping aside Urszula Radwanska 6-0, 6-3 on Thursday to reach the Qatar Open quarterfinals. If the 31-year-old Williams reaches the semifinals by beating seventh-seeded Petra Kvitova she will return to No. 1 for the first time in 2 1/2 years. Chris Evert was No. 1 in 1985 while just shy of her 31st birthday.
• Rachel Alexandra remains in serious but stable condition following surgery related to complications from the birth of her filly. Doctors at Rood and Riddle Equine Clinic said Thursday that it's "too early" to determine the prognosis for the 2009 Horse of the Year.
• Les Miles will introduce Cam Cameron as LSU's new offensive coordinator today.
• Former Olympic shot put champion Udo Beyer admitted doping, saying in a documentary that it was his personal decision and that, still, he won the gold medal in 1976 because he was "the best" and not because he doped.