Denver Bronco running back Damien Nash was buried today in St. Louis.
He collapsed and died February 24th after a charity basketball game .
The cause of the 24 year old's death remained unclear after an autopsy.
Further tests were being conducted.
He had played three games for Denver after being drafted in 2005 from Tennessee.
Nash was the second Bronco to die in two months.
Cornerback Darrent Williams was shot and killed New Year's Eve.