Even though he only played with the Minutemen for two seasons Blackwell finished his collegiate career ranked sixth on the schools all-time pass defended list.
Blackwell was signed by the New York Giants in 1997 shortly after his college career as an undrafted free agent.
In the offseason he was allocated to the Giants NFL Europe team the Scottish Claymores and played in 10 games with the Claymores where he notched 27 tackles, 12 pass defences, eight special teams tackles and three interceptions including one returned for touchdown.
He spent the season with the Browns appearing primarily on special teams and as a backup cornerback and did not record a tackle.
After the XFL season, Blackwell signed with the Jacksonville Jaguars prior to training camp but was cut in the preseason.