Jets quarterback Mark Sanchez says he is adopting a new attitude for the team's playoff run. Sanchez pledged to shelf his smiles and pranks on teammates and be more serious for the home stretch of the regular season. "All we know is (we are) playing more than 16 games," Sanchez said. "So I don't want to be the reason for that not to happen. That's why my demeanor's changed a little bit. If I'm giving off any vibe, it's that we need to play well, more focused and there's no time to mess around. We'll have fun winning games."