Williams's agent told Schefter the five-year deal is worth $66 million with $43.25 million guaranteed. The deal will make Williams the highest-paid left tackle in the NFL, according to the report.
Williams, 27, was drafted fourth overall by Washington in 2010. He has started every game but one at left tackle in the last three seasons, making the Pro Bowl each year.
Williams reacted to his new contract on Twitter after multiple reports:
Williams, who lost 27 pounds this offseason, is one of the few constants in the Redskins' offense.