Although it was reported last month that Belichick's contract was worth $50 million over the next five years, reports have surfaced that Belichick's contract remains unsigned. Last week, there were reports that multiple NFL clubs, including the Las Vegas Raiders, were interested in Belichick.

Belichick famously spurned the New York Jets after he was named Bill Parcells’s successor. His tenure lasted less than 24 hours after he wrote his resignation on a napkin and jumped ship to take over the New England Patriots. This move paid off handsomely.

Detroit Lions offensive coordinator Ben Johnson is considered the top candidate in this year's cycle. Other names that continue making the rounds include Mike Vrabel (former Tennessee Titans HC), Brian Flores ( Minnesota Vikings defensive coordinator), and Joe Brady ( Buffalo Bills offensive coordinator).