Buffalo Bills rookie running back Devin Singletary says TWO legendary running backs have been giving him the secrets to success in the NFL ... and he's telling all to TMZ Sports.
After Devin balled out on Sunday -- 140 yards from scrimmage and a TD -- teammate Frank Gore brought over Adrian Peterson to give him some post-game love.
22-year-old Singletary -- a 3rd round pick out of FAU -- says Peterson not only gave him career advice, but offered to be a mentor. Devin tells us how the conversation went down, it's pretty cool.
In fact, we reached out to Peterson .