There was concern leading up to the season about Tom Brady's foot after he missed the enitre preseason. However, those concerns quickly turned to his left knee during the first quarter of Sunday's game against Kansas City.

Brady was hit by Chiefs' safety Bernard Pollard, who was taken to the ground by the Patriots and was working to recover as he made contact with Brady. The quarterback's his leg got hung up in the turf and he went to the ground screaming. Brady was helped off the field, but was able to walk down steps (still tryinig to figure out why he was doing that?).

"He was in a lot of pain. When you hear a scream, you know that," Kansas City safety Bernard Pollard told the Boston Globe.

Untested Matt Cassel took over, and played well as the Patriots beat the Chiefs 17-10 in Sunday's opener. But they needed a last minute defensive stand to do it. Cassel, who had thrown just 39 passes in his first three seasons, went 13-for-18 for 152 yards and one touchdown.

There was no word on the extent of Brady's injury -- "I am not sure what we are dealing with," coach Bill Belichick said -- or how long he would be out. But his 128-game starting streak, third-longest in NFL history, is in jeopardy.

Peter King on NBC's Football Night In America said that his sources say "it is serious knee injury and it could threaten his season".

The Patriots have proved time and time again that they have interchangable parts and seem to be better than any other team and dealing with injuries. However, replacing a quarterback the caliber of Brady and his three Super Bowl rings is not going to happen. If he's out for an extended period, the Jets become my pick in the AFC East.

Fantasy Football, NFL patriots, tom brady, bernard pollard, bill belichick, matt cassel