The day before, Carpenter's family said he had been hospitalized and was "getting the best care possible", but asked for prayers and privacy while he remained in a coma.
Carpenter, a Baltimore native, played his college ball at Virginia Tech.
Keion Carpenter joined the Atlanta Falcons in a trade with the Buffalo Bills in 2002.
Keon Carpenter passed away at 6:47 am this morning at Jackson South Community Hospital in Miami. It would be his final National Football League season.
In a tweet coach Frank Beamer said "Keion was the one of the rocks around which we built our program at Virginia Tech in the 1990s".
Carpenter's death comes just days after former special teams coordinator Bruce DeHaven died following a battle with prostate cancer. More importantly, he had a heart of gold.
Before joining the Bills, Carpenter played for the Virginia Tech Hokies.
Beamer also sent his condolences to Carpenter's family for the 'loss of a great Hokie'.
He founded The Carpenter House in 2005 as a way to help improve environments for disadvantaged families. He leaves behind four children.
Upon retirement, Carpenter established "The Carpenter House", a non-profit organization dedicated to helping under-priviliged families find homes.
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