He took his life over the weekend, according to reports. He was 48.
He is survived by his wife and two children.
Mitchell, along with QB Mike Hold and a tremendous defense, tore through opponents including Pittsburgh, Florida State and Notre Dame in 1984 — leading the Gamecocks to a 9-0 record and national prominence.
But a 38-21 loss to Navy on Nov. 17, 1984 — which some attributed to the Chicken Curse — ended the Gamecocks' chances at a national title. South Carolina wrapped up with a win over rival Clemson before losing to Oklahoma State in the Gator Bowl.