The Jaguars announced his death on Monday.
Carrie Costello, the coroner of Tippecanoe County, told the Lafayette Journal & Courier that preliminary autopsy results indicated no foul play was involved in his death and that he could have suffered a heart attack, although toxicology results are pending.
The publication said Nwaneri drove from Georgia to his wife's home in Indiana, where she found him, collapsed, about 1 a.m. Friday.
The Jaguars selected Nwaneri in the fifth round (149th overall) of the 2007 NFL Draft. Following his rookie season, he earned a spot on the starting offensive line. He started 92 of the 104 games he played with the Jaguars until his release in March 2014.
He went on to begin a YouTube channel, "The Observant Lineman," on which he and former players analyzed game tape. His most recent show was uploaded two weeks ago.
