Santonio Holmes doesn't think a two-quarterback system can succeed in the NFL, but does believe the Jets can pull it off with scripted roles. Without Tim Tebow operating under a specific set of plays, Holmes suggested, it could pose a problem for starter Mark Sanchez. "You have to allow one quarterback to get into the rhythm of a game and it starts from the preparation in practice," Holmes said. "(It's) knowing the first couple of plays that he's going to take these reps, it's getting the feel for coming onto the field with the crowd awaiting you, it's making the mistakes early in the game to finishing the games at the end. "You don't just change a guy out just because he has a few mistakes early into a game. Coming into this season, we have a lot to expect from Sanchez." The Jets plan to use both quarterbacks, but they've been emphatic about Tebow's role, insisting he's not competing with Sanchez.