"Because we played two quarterbacks," he said.
Tebow, per ESPNBoston.com, said: "You prepare yourself and be ready for whenever your number is called. There's nothing else to it."
NFL.com's Ian Rapoport noted that sitting Tebow was in the works from the start:
Tebow's a storyline because he's Tebow, but he has struggled to move the ball against backups. Belichick -- not a sentimental creature -- has but 53 spots to give. Tebow has one more game to prove he's worth one.