Reports surfaced Tuesday afternoon that the Detroit Lions were close to signing franchise quarterback Matthew Stafford to a long-anticipated extension.

The extension - which will add three years to the two remaining on his existing deal - is reportedly valued at $53 million, making the full five year contract worth $76.5 million ($43 million guaranteed).

It would also make Stafford one of the highest paid quarterbacks in the NFL. Stafford's average annual salary of $15.3 million ranks sixth behind Joe Flacco ($20.1), Drew Brees ($20.0), Peyton Manning ($19.2), Aaron Rodgers ($18.68) and Tony Romo ($17.07). He squeaks in just above Eli Manning ($15.27).

But former NFL quarterback Donovan McNabb, who played 13 seasons in the league and led the Philadelphia Eagles to seven playoff appearances, says Stafford isn't worth that kind of money.

"When you look at just the numbers overall, you have to think about 12,000 yards and being the youngest quarterback to reach this feat and also the things he's been able to accomplish, you know you begin to question this." McNabb said Tuesday night on NFL Total Access. "It's about wins and losses again. Now, as a quarterback and as Matt Stafford, hey, I would take that contract just like Tony Romo took his contract. But is he worth top 5 money? I would have to say no. And I say that because it's about wins and losses.

"What has he really done for the Detroit Lions? Nothing."

Romo and Stafford are the only quarterbacks amongst the seven listed above who do not have a Super Bowl ring. Three time Super Bowl champion Tom Brady's salary pales in comparison at a modest $6.4 million.

But it's not always about the rings. For the 25-year-old Stafford, it's about timing and value to his team.