In his third season with San Diego, Neal has played in 183 consecutive regular-season games dating back to the 1994 season.
Originally a fourth-round choice (89) by New Orleans in 2003, the Chargers represent his fifth team. A Pro Bowl player following the 2002 season and a first-alternate the past two seasons, Neal has paved the way for eight-straight 1,000-yard rushers.
He had originally signed a three-year pact worth $4.5 million that would have expired this year. He has had two years tacked on to the deal. Financial details were not immediately available.