Now that the Jets have been soundly beaten by the Patriots (proving that they are incapable of beating a playoff caliber team) they cannot afford to lose one more game the rest of the season, if they do they're out of contention for the playoffs.
If the Jets lose one more game they should finally bench Sanchez and start Tim Tebow. This would allow the Jets to see what they have in Tebow and improve his trade value at the same time. If by some chance Tebow does exceptionally well then the Jets can either keep him or trade him in the offseason. The way things stand now it would be hard to trade Tebow because no one has seen him play this year. By starting him after the next loss the team has nothing to lose as far as the playoffs are concerned but everything to gain in trade value and QB depth determination.
So one more loss and start Tebow, plus give McElroy some 4th quarter snaps to get him some experience and check him out too.