Saints rookie quarterback Tyler Shough got a ringing endorsement from former All-Pro DB Tyrann Mathieu following his big upset win over the Tampa Bay Buccaneers on Sunday ... "kind words" Shough reacted to when he chatted with TMZ Sports!
We spoke with Shough -- who was with his Pro Bowl teammate Cam Jordan at a Raising Cane's event -- just a few days removed from Mathieu's declaration that ... "This city should absolutely get behind him & embrace him as QB for (the) next decade!!"
In other words, Tyrann's seen enough -- Tyler's the guy.