Soon after Super Bowl XXXI, Belichick (and most of the Patriots assistant coaches) migrated with Parcells to the New York Jets. Belichick served as assistant head coach and defensive coordinator for the Jets from 1997 to 1999. When Parcells stepped down as head coach in 1999, he had already arranged with team management to have Belichick succeed him. However, Belichick would be the New York Jets' head coach for only one day. When Belichick was introduced as head coach to the media—the day after his hiring was publicized—he turned it into a surprise-resignation announcement. Before taking the podium, he scrawled a resignation note on a sheet of loose leaf paper that read, in its entirety, "I resign as HC of the NYJ." He then delivered a half-hour speech explaining his resignation to the assembled press corps.[9]

Soon after this bizarre turn of events, he was introduced as the Patriots' 12th full-time head coach, succeeding the recently fired Pete Carroll. The Patriots had tried to hire him away from Parcells/the Jets in the past. Parcells and the Jets claimed that Belichick was still under contract to the Jets, and demanded compensation from the Patriots. NFL Commissioner Paul Tagliabue agreed, and the Patriots gave the Jets a first-round draft pick in 2000 in exchange for the right to hire Belichick.