One of the deans of NFL assistant coaches is calling it a career.

A source told Sporting News that Richard Mann is retiring as Pittsburgh Steelers wide receivers coach.

Mann, 70, joined the Steelers in 2013 and helped in Antonio Brown’s development toward becoming a record-setting NFL wideout. Pittsburgh rookie JuJu Smith-Schuster also quickly became an impact player this season under Mann’s tutelage.

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Mann’s NFL coaching career began with the then-Baltimore Colts in 1982. He also worked for Cleveland (1985-1993), the New York Jets (1994-96), Baltimore (1997-98), Kansas City (1999-2000) and Tampa Bay (2002-2009). Mann then worked as a private coach for wide receiver prospects entering the draft before joining Mike Tomlin’s staff in Pittsburgh.

(Getty Images) https://images.daznservices.com/di/library/sporting_news/5c/34/richard-mann-011618-getty-ftrjpg_qnli96u8lmj7zhxw3q551twz.jpg?t=553801&w=500&quality=80

Richard Mann, pictured with the Buccaneers in 2005 (Getty Images)

Mann had told TimesOnline.com last summer that he was going to retire after the 2017 season. However, Mann has changed his mind about following through on such plans in the past.

It doesn't appear that will be the case this time.

Alex Marvez can be heard from 7 a.m. to 11 a.m. ET Wednesday on SiriusXM NFL Radio.