Jett attended Northumberland High School where he played football and baseball, receiving All-State honors as a pitcher and outfielder.
Jett was signed as an undrafted free agent by the Minnesota Vikings in 1992 and was released before the start of the season.
On March 10, 1993, he was signed by the Dallas Cowboys and replaced Mike Saxon on the defending Super Bowl champion.
After a block, in the NFC Championship Game win against the Green Bay Packers, he went on to average 45.8 yards and tie the mark for the third highest punting average in the franchise postseason history, receiving NFC Special Teams Player of the Week honors.
[3] Jett was signed as a free agent by the Detroit Lions in 1997, after the salary cap-strapped Cowboys could not afford to re-sign him.