It all started when the Jets picked Geno Smith in the 2nd round of the draft, leading everyone to believe that the Sanchez era was done in New York. The Jets time and time again have said that it will be a competition for the quarterback job, and nothing is set in stone. After a horrendous season a year ago, most Jet fans want Geno over Mark. Even if he catches on with Marty Mornhinweg's offense in training camp, it will be tough for Mark knowing everyone is rooting against him except maybe Woody Johnson and Rex Ryan.
Even if Sanchez starts, it probably won't be fun for him. The lack of weapons on the Jets offense is obvious, and the boos he will hear at all times during home games will be tremendous. Jets fans have seen Sanchez during his good times, but in order to succeed he might need a change of scenery.