Too many to count.
Notable comeback wins -
1976 down 20-9 vs. Steelers, win 30-27
1984 down 23-0 vs. Seahawks, win 38-23
1984 down 20-6 vs. NY Jets, win 30-20
1991 down 20-17 in final minute vs. Oilers, win 24-20
1991 down 17-10 vs. Indianapolis Colts, win 23-17 in overtime
1992 down 31-21 at Indianapolis, win 37-34 in overtime
1994 down 20-0 vs. Vikings, win 26-20 in overtime
1996 down 21-0 at New York Jets, win 31-27 - then down 22-0 at New York Giants, win 23-22
1998 down 23-19 vs. Dolphins in final minutes, win 26-23 - then down 21-17 vs. Bills in final seconds, win 25-21
1999 down 28-7 vs. Colts, win 31-28
2001 down 26-16 vs. Chargers, win 29-26 in overtime - then down 13-3 vs. Raiders, win 16-13 in overtime
2002 down 27-6 at Bears, win 33-30 - then down 24-13 vs. Dolphins, win 27-24 in overtime
2003 down 26-23 in final minute at Broncos, win 30-26 - then down 20-13 in final minutes at Texans, win 23-20 in overtime
2007 down 20-10 at Colts, win 24-20 - then down 24-20 at Ravens, win 27-24 - then down 28-16 at NY Giants, win 38-35
2008 down 21-13 at Seahakws, win 24-21
2009 down 24-13 vs. Bills, win 25-24
2010 down 20-10 vs. Ravens, win 23-20 in overtime
2011 down 16-13 in final minute vs. Cowboys, win 20-16 - then down 17-0 vs. Dolphins, win 27-24 - then down 21-0 vs. Bills, win 49-21
2012 down 21-7 at Bills, win 52-28
Noteworthy also - in 1964 the Patriots erased a 34-14 Raiders lead to force a 43-43 tie.
Three.
43
51 in the regular season
Brett Favre has 39 4th quarter "come from behind" victories and 3 additional overtime wins.
3
John Elway
COLTS
The Patriots.
25
They have played in seven with three wins.
the steelers plus they rock
The New England Patriots