New England Patriots quarterback Tom Brady may have only sprained his left knee, according to WBZ-TV, which is reporting that the star passer will be examined again later tonight.

"He'll be fine," an NFL source told WBZ.

Brady injured his knee when offensive tackle Nate Solder got bull-rushed into him by defensive end Adrian Clayborn today during a joint practice with the Tampa Bay Buccaneers.

"I don't know definitively what's going on with Tommy because I haven't been back in my office yet," Patriots team president Jonathan Kraft told the Boston Herald. "But I'm under the impression that it's probably not that serious, but that's not a definitive answer."

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Aaron Wilson covers the Ravens for The Baltimore Sun.