Despite denying attempting to trade Rob Gronkowski and rumors that Brady threatened to retire to keep him, the Patriots did in fact, according to Albert Breer, discuss a Gronk trade with at least four teams.  

The Lions, Titans, Texans and 49ers were all said to have had conversations with New England about Gronk.

Via NESN:

The fun in New England these days is almost too much to take.  There is PED, retirement, trade and personal trainer drama dripping out of the facility.  It should make for an enjoyable 2018 season.