The Redskins also cut former CFL player Mike Sellers on Monday, the day before the start of the NFL's free agency signing period.
Atogwe, a native of Windsor, Ont., signed a five-year, US$26-million contract just before the NFL lockout a year ago. But he was hampered by hamstring, toe and knee injuries and finished the season as a backup.
He was set to make $3.4 million this year.
Sellers began his pro career in 1995 with the CFL's Edmonton Eskimos and spent the the 2002 and '03 seasons with the Winnipeg Blue Bombers. He has played 11 seasons with the Redskins, first joining the team in 1998 and returning in 2004.
He was used mostly as a backup tight end last season. He was set to make $1.045 million in 2012.