There was a bit of a scare Wednesday at New England Patriots camp where quarterback Tom Brady went down and grabbed his left knee after an incomplete pass in 11-on-11 drills in a joint practice with the Tampa Bay Buccaneers.

But an MRI on Brady's knee was negative and he is considered day to day a source with knowledge of the injury told ESPN NFL Insider Adam Schefter.

Video taken by a fan showed Bucs defensive lineman Adrian Clayborn push Patriots offensive lineman Nate Solder into Brady's leg just after Brady threw the ball. Brady immediately went down and grabbed his leg.

Patriots president Jonathan Kraft was not at the practice but heard what happened. In an interview with Boston sports radio station 98.5 The Sports Hub Kraft said he made a phone call to check on Brady's status and was told that it "hopefully did not appear to be that bad."

"I understand from people who were standing out here it may have looked serious" Kraft said. "I don't have a definitive answer. And in classic [coach] Bill Belichick fashion I will tell you a little bit more though and just say I don't believe it's serious but I do not know."

After limping to the sideline under his own power Brady missed one play before rejoining and finishing the drill completing three more passes. Following the drill Brady huddled with Belichick offensive coordinator Josh McDaniels and head trainer Jim Whalen and it was determined that Brady would not continue to practice.

He jogged off the field with Whalen.

After practice Clayborn told reporters he was bull-rushing Solder on the play that Brady was injured and that Solder fell back into Brady.

"You always have to stay away from the quarterback but if you have a guy on his heels my instinct is to keep going" Clayborn said.