Running back James Cook is cashing in on his career year with the Buffalo Bills. The two sides agreed to a four-year, $48 million extension, according to ESPN's Adam Schefter. The deal includes $30 million guaranteed.

James Cook has secured a four-year, $48 million contract extension. Is he one of the top RBs in guaranteed money?

Running back James Cook and the Bills have reached agreement on a four-year, $48 million contract extension that includes $30 million guaranteed, his agents told ESPN.