India, July 18 -- TJ Watt and the Pittsburgh Steelers on Thursday agreed to a historic three-year, $123 million contract extension, making the edge rusher the highest-paid non-quarterback in NFL history, ESPN's Adam Schefter reported, citing sources. The deal has, however, brought up several questions about Watt's age and injury concerns.

The edge rusher and the Steelers signed the extension after months of uncertainty around his future. The team management was clear - they wanted to keep Watt, but speculation peaked after the Pro Bowl star skipped mandatory minicamp.

The deal ensures $108 million fully guaranteed at signing, and the $41 million average per year tops the $40 million APY, ESPN added.

Born October 11, 1994, Watt is 30 ye...