Otis Clay, Chicago Blues and Soul Singer, Dies at 73

Daniel Boczarski/MSBB14/Getty Images for Blackbird Productions
Otis Clay performs "I Ain't Raisin' No Sand" onstage during I'll Take You There: Celebrating 75 Years Of Mavis Staples at Auditorium Theatre on November 19, 2014 in Chicago, Illinois. 

R&B artist Otis Clay, a hall of fame musician who also was a community activist on Chicago’s West Side, has died. He was 73.

Miki Mulvehil was the one-time Grammy nominee’s manager. She told The Associated Press that Clay died of a heart attack about 6:30 p.m. Friday (Jan. 8). The news was also posted on his Facebook page.

Heart & Soul artist management is very sad to announce Otis Clay passed away unexpectedly of a heart attack in the early...

Posted by Otis Clay on Friday, January 8, 2016

Mulvehil says Clay was preparing an upcoming gospel tour and had been nominated for two Blues Music Awards -- one for his 2015 album with Billy Price, This Time For Real, and one for soul blues music artist.

Clay was inducted into the Blues Hall of Fame in 2013.

Mulvehil says Clay was not only a great musician but a humanitarian, working on charitable causes. He often performed his 1993 standard, “When the Gates Swing Open” for funerals.