Patriots coach Bill Belichick believes that wide receiver Wes Welker was injured on a field in Houston that was in horrible condition. Welker suffered a serious left knee injury in a 34-27 loss to the Texans on Sunday on what Belichick called "one of the worst fields I've seen." Belichick said the field was inconsistent -- spongy in parts and hard in others -- causing players to get a different feel with each step.