EDEN PRAIRIE, Minn. -- Minnesota Vikings running back Adrian Peterson has a torn meniscus in his right knee, coach Mike Zimmer said Monday.The Vikings are still evaluating the injury and have not yet determined how much time he will miss. Zimmer initially announced the nature of the injury while recording his weekly appearance on a local radio show and told KFXN-FM that he has not yet ruled out Peterson for the game on Sunday against Carolina.Peterson was meeting with team doctors and athletic trainers to discuss his options, which include surgery to address the injury.We are going through the evaluation process to figure out what the next procedure will be, Zimmer told reporters during his weekly news conference. We are still going through all the options.Peterson, the 2012 NFL MVP, was injured in the third quarter of Minnesotas 17-14 victory over the Green Bay Packers on Sunday night on a 5-yard run , his longest of the night. He needed crutches to exit U.S. Bank Stadium, but it does appear Peterson will be able to return at some point this season after initial fears that he tore his ACL.Peterson has long had a reputation as a fast healer, which was never more clear than when he tore the ACL in his left knee with two weeks to play in the 2011 season and still made it back to start the 2012 season. A torn meniscus is considered much less serious than a torn ACL, but it still often calls for several weeks of rehab before a player is ready to take the field again.Anytime you have a guy like that in a leadership role that does go down, obviously everyone kind of takes a step back, defensive captain Brian Robison said. You never want to see guys go down like that. But at the end of the day you understand that there is still a task at hand. This is the NFL and thats going to happen.The Vikings (2-0) have three more games before their bye week.Peterson has rushed for just 50 yards on 31 carries in the first two weeks.Were going to keep plugging away and keep doing our best to find a way to win, Zimmer said.---Online:AP NFL website: http://www.pro32.ap.org and AP NFL coverage on Twitter: http://www.twitter.com/AP-NFLNBA Jerseys China . He said Tuesday thats a big reason why he is now the new coach of the Tennessee Titans. Whisenhunt said he hit it off quickly with Ruston Webster when interviewing for the job Friday night. 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ABU DHABI, United Arab Emirates -- Brazilian Felipe Massa is definitely retiring after the season-ending Abu Dhabi Grand Prix this weekend and British driver Jenson Button has no plans to come back.With more than 550 races between them, the highly popular 30-somethings will be missed on the F1 circuit.The 36-year-old Button is making way for Belgian driver Stoffel Vandoorne, who will partner Fernando Alonso at McLaren next year.Button retains an option to race in 2018 if both parties agree, although at this stage that seems unlikely.I go into this weekend thinking its going to be my last. I dont want to be racing in Formula One beyond this race, said Button, who will be in a consultancy role with McLaren next year. This is the way I think about it. But who knows, this could change in six months or one year.Button won the F1 title against the odds in 2009 for the Brawn team, and has 15 GP victories overall.You get to Formula One with many dreams and you aspire to be something, Button said Thursday at a news conference ahead of Sundays race. Ive raced with two of the teams I dreamt of racing with as a kid: Williams and McClaren -- and when I did win the championship, it was with a privateer team.After his first F1 race at age 20, Button is set to start his 305th GP on Sunday, putting him just one behind seven-time F1 champion Michael Schumacher of Germany.I will definitely step away from Formula One happy with what Ive achieved, said Button, who hopes F1 will become more competitive when rule changes aimed at making cars faster come into play next season.The main reason to turn on and watch Formula One is the fighting. Basically Mercedes are doing too good a job and no one else is doing a good enough job, Button said. Hopefullly the rule changes will help teams find a new direction.ddddddddddddIts not been a great season for either driver. Massa is 11th overall, while Button is 15th, and neither of them has finished higher than fifth this year.Massa, one of the most well-liked drivers on the circuit, overcame a serious head injury sustained at the Hungarian GP in July 2009.He never won the F1 title, missing out the year earlier in the cruelest fashion.After winning the season-ending GP in Brazil, he thought the title was his and his Ferrari team began celebrating wildly.But Lewis Hamilton moved up to fifth place right at the end of the race and pipped him to the title by one point.Sunday will be Massas 250th start and this time he intends to finish the race, after crashing out of the Brazilian GP two weeks ago.I even prepared the Brazilian flag, said the 35-year-old Massa, who won his 11 career races driving for Ferrari. I was so disappointed to finish like that.Still, at least it gave him the chance to walk around the track and soak up the atmosphere from his devoted fans.Its difficult to describe. It was such an emotional feeling, said Massa, who was 20 when he first raced in F1. I started to cry and I couldnt hold it back.Then, as he entered the paddock, he was given an ovation.When I got back to the pit lane I saw all the teams out (to greet me) and I couldnt believe it, Massa said.It reminded him that, even though he never took the title during his heyday with Ferrari, he won widespread respect and admiration.That is what you represent on the human side, Massa said. Thats really a lot bigger than a simple trophy. ' ' '