The Pittsburgh Steelers are working to complete an extension for quarterback Ben Roethlisberger before the NFL draft begins Thursday night, sources told ESPN's Adam Schefter on Tuesday.

The 37-year-old Roethlisberger, who was drafted by the Steelers in 2004, is heading into the final season of four-year, $87.6 million deal that he signed in 2015. Pittsburgh, however, wants to retain him beyond that.

The two sides have been talking since the end of the season and are now making progress and getting closer to getting the deal in place, a source told ESPN.