FOXBOROUGH, Mass. -- Tom Brady walked off the field under his own power. Several teammates didnt think he was hurt badly when he grabbed his left knee after being knocked down. Yet the possibility that the New England Patriots might lose their star quarterback caused a scare at the teams joint practice with the Tampa Bay Buccaneers on Wednesday. A person with knowledge of the injury said an MRI was negative and Brady was day-to-day with a left knee sprain. Asked if Brady might play Friday night in an exhibition game against the Buccaneers, the person said he didnt know. The person spoke on condition of anonymity because the Patriots didnt make an announcement. The two-time league MVP had a season-ending injury to the same knee in the 2008 opener. Brady was injured midway through practice Wednesday when left tackle Nate Solder was pushed into him by Tampa Bay defensive end Adrian Clayborn. Brady, entering his 14th NFL season, fell, rocked backward on the ground and held his left knee. He went to the sideline then returned for a few more plays before talking with coach Bill Belichick and leaving the field toward the teams indoor practice facility next to it. "Youve always got to stay away from the quarterback (in practice)," Clayborn said. "You got a guy on his heels and my instinct is to keep going, so thats what I did." The contact came just as Brady threw a long incompletion down the right sideline toward rookie Aaron Dobson. "Were always working to protect," Solder said. "Ill have to see what happened on the film. I screwed some things up here and there." In 2008, Brady tore the anterior cruciate ligament in his left knee. The Patriots missed the playoffs that season. He has played every game since then and the team reached the playoffs in all four seasons. New England is favoured to win the weak AFC East for the 10th time in 11 years. Losing Brady would have made that much tougher. After Brady left the field, third-year pro Ryan Mallett played with the first offensive unit and Tim Tebow, on his 26th birthday, played with the second team. Mallett threw an interception soon after taking over. "Im just trying to do my job," Mallett said. "Im sure Tom will be fine and well just go on." In his first series after Brady left, Tebow completed three of seven passes and looked fairly sharp. One of his passes was dropped. Tebow left practice without speaking with reporters. "Anytime anybody, especially a teammate, goes down its a dark cloud. Its unfortunate," Patriots running back Shane Vereen said. "He went back out there, but well see." Running back LaGarrette Blount was optimistic. "He walked off," Blount said. "Im sure hes cool. Im sure hes fine." But shortly before Blount spoke, a black helicopter landed on a field adjacent to the one where Brady was injured. Cameramen, apparently concerned that Brady might be airlifted to a hospital, rushed to record the landing. "The helicopter has nothing to do with Tom," Patriots owner Jonathan Kraft said on WBZ-FM. Tampa Bay coach Greg Schiano said he and Belichick stress to their players to rush the passer but let him throw the football and go past him. "I didnt get to see" the hit on Brady, Schiano said. "I saw him laying there afterward. ... I hope hes OK." Losing Brady would leave the Patriots without a proven starting quarterback. Mallett has thrown just four passes in his first two seasons and has been inconsistent during training camp. Tebow signed as a free agent on June 10 and has struggled with his throwing mechanics, a problem hes had since being drafted by the Denver Broncos in the first round in 2010. "The big thing is just his familiarity with the offence, the way we do things -- the play calling, the reads, formationing, just general things we do," Belichick said of Tebow. "The quarterback has to have a good understanding of all that. The more you do it, the more you get comfortable with it and the better you can execute it. I think thats no different, really, than any other young quarterback or quarterback coming into a new system." In the Patriots 31-22 exhibition win over the Philadelphia Eagles on Friday night, Mallett completed 9 of 18 passes for 97 yards. Tebow went 4 for 12 for 55 yards with three sacks and ran four times for 31 yards. Brady completed 7 of 8 passes for 65 yards and one touchdown and left after the first two series. LeCharles Bentley Jersey . A question that was repeatedly posed last season, and the season before that and in the 2011 campaign before that. Derland Moore Jersey . -- The Los Angeles Angels have agreed to a minor league contract with reliever Brandon Lyon that includes an invitation to their big league camp for spring training. http://www.customsaintsjersey.com/custom...arge-2552e.html. -- Masahiro Tanaka knows that first appearance in a spring training game for the New York Yankees will be scrutinized. Henry Childs Jersey . Rinehart joins safety Darrell Stuckey and linebacker Donald Butler as potential unrestricted free agents who are remaining with the team. Mark Fields Jersey . Still, Milan remained five points behind city rival Inter Milan in the race for fifth place and the final Europa League berth, after Inter beat 10-man Parma 2-0. Meanwhile, Paul Pogba led the way as Juventus stayed on course for a third consecutive title with a 1-0 win over relegation-threatened Bologna.MINSK, Belarus -- The Czech Republic scored three second-period, power-play goals in beating the United States 4-3 in the quarterfinals of the ice hockey world championship on Thursday. Also, Russia blanked France 3-0 to face defending champion Sweden or Belarus in the semifinals on Saturday. The Czechs will play Canada or Finland in the semis. Captain Tomas Rolinek answered Brock Nelsons power-play goal in the opening period, and Tomas Hertl, Roman Cervenka and Ondrej Nemec all beat veteran goaltender Tim Thomas on power plays in less than 10 minutes in the middle period. U.S. captain Justin Abdelkader received a five-minute penalty and was ejected for a big hit on forward Vladimir Sobotka, who needed treatment on the ice and did not return to the game. Czech coach Vladimir Ruzicka didnt give details about his injury but said he hoped Sobotka will be available for the semis. Tyler Johnson reduced the deficit to 4-2 with 1:10 left in the game, and added his second 13 seconds later, but it was too late and the U.S., bronze medallists last year, came up short. "I wish they (the goals) would have come a little sooner," Johnson said. Herttl and Cervenka scored from rebounds during Abdelkaders penalty, and Jaromir Jagr set up Nemec to drive a slap shot past Thomas.dddddddddddd "We scored three power-plays goals and that decided the game," Jagr said. "But we messed things up in the last two minutes. It was a lesson for the young players, and for those who never experienced that the game ends only after the final whistle." Russia star forward Evgeni Malkin made his presence felt in his second game at the worlds as he scored a power-play goal and added an assist, and Artyom Anisimov and Alexander Kutuzov also scored at Frances expense. "I felt much better today, I had the time to get acclimated," said Malkin, who arrived from the NHL playoffs. "It was a good win but we could have played better and been more effective." Goaltender Sergei Bobrovski stopped 16 shots for the shutout. Another Russian star, forward Alex Ovechkin, returned after he missed a game due to a right leg injury. "It was a bit awkward to skate in the brace," Ovechkin said. "But Ill play without it the next game, and everything will be OK." ' ' '