Sources: Dante Scarnecchia agrees to return as Pats' O-line coach

Caplan: Scarnecchia one of most significant hires of offseason (1:18)

Adam Caplan and Darren Woodson explain the impact having Dante Scharnecchia back coaching the offensive line will have on the Patriots. (1:18)

Dante Scarnecchia and the New England Patriots have reached a deal for him to return as the team's offensive line coach, sources told ESPN's Adam Caplan.

Scarnecchia had retired following the 2013 season after 32 years in the NFL, 30 of which came in New England, from 1982-88 and 1991-2013. He coached the offensive line for his final 15 seasons in New England and has remained around the team since his retirement, primarily helping with evaluations of college offensive linemen entering the NFL.

Scarnecchia, who turned 68 on Sunday, earned the 2015 Paul "Dr. Z" Zimmerman Award by the Professional Football Writers of America. The award is given for lifetime achievement as an assistant coach.

The Patriots hired Dave DeGuglielmo to replace Scarnecchia in 2014, but DeGuglielmo's contract was not renewed when it expired after the 2015 season.

DeGuglielmo has since been hired by the San Diego Chargers as assistant offensive line coach.