Matt Millen

Colin Kaepernick's days in the NFL are NOT over ... so says ex-Detroit Lions GM Matt Millen who tells TMZ Sports he's convinced the guy will sign a contract before the season begins. Long story short ... Millen is convinced Kaepernick still has the talent to play winning football and says NFL…

Matt Millen says all traces of his work in Detroit are "long gone" ... and he couldn't be more proud of how the Lions have bounced back into one of the best teams in the NFL. Of course, Millen was the President and CEO of the Lions from 2001 to 2008 and posted a 31-84 record during his run with…