NFL Draft Fav Jarvis Jones -- Free Subway Sammies FOR LIFE

NFL draft favorite Jarvis "Dawg Bones" Jones is getting better footlong treatment than Jenna Jameson ... because TMZ has learned, Subway is giving him free sandwiches ... FOR LIFE!

Jarvis -- a projected 1st-rounder in tomorrow's NFL Draft -- just signed a tasty 6-figure endorsement deal with Subway ... that included the elusive Subway Black Card, which can be used to purchase all the sandwiches the holder wants, and never expires.

Jones -- a 6'3," 241-pound linebacker out of Georgia -- joins a pretty exclusive group of black card holders, which includes Michael Strahan and Robert Griffin III.

According to the experts, Jarvis will probably be selected within the first 10 picks of tomorrow's draft -- and will become an instant millionaire.