Re: Case Keenum grabs early edge in Texans backup QB
Then we have Gary Danielson who was undrafted and spent two years in
the WFL before making it a career in the NFL.
Steve Deberg was drafted at #275 overall, which is basically an UDFA.
He went on to a long career after not making the roster his first year.
A lesser name is Jay Fielder, who was undrafted.
After not playing in 1995, he became a college coach for two years before making it to the NFL in 1998, finishing with a career 37-23 record.