WWE Hall of Famer Robert Windham – also known as Blackjack Mulligan – passed away at the age of 73 according to a report by WWE.COM.

Windham had been suffering from bad health over the past few months and in early February members of his family missed Monday Night Raw to be with him when he was hospitalized and in serious condition.

He is the father of Barry and Kendall Windham, father-in-law of Mike “IRS” Rotunda and the grandfather of WWE Superstar Bray Wyatt and Bo Dallas.

He was inducted into the WWE Hall of Fame class of 2006 along with his tag team partner Blackjack Lanza by their former manager Bobby “The Brain” Heenan.