(1:03)Open Extended ReactionsLOS ANGELES -- The Los Angeles Chargers and two-time Pro Bowl left tackle Rashawn Slater agreed Sunday on a four-year $114 million contract extension that includes $92 million guaranteed, sources told ESPN's Adam Schefter. The contract makes Slater the highest-paid offensive lineman by average annual pay in a contract in NFL history. The Chargers announced Sunday they reached an extension with Slater but did not disclose terms of the contract. Slater sets standard: APY in OL contracts The $28.5 million average per year in Rashawn Slater's new contract with the Chargers sets a record for NFL offensive linemen. With Slater now tied to the Chargers through the 2029 season, perhaps the Chargers' biggest offseason storyline is behind them.