3. Brad Johnson
Brad Johnson was so overlooked by NFL teams that he was taken in the 9th round of the 1992 NFL Draft; in other words, if he was coming into the NFL today, he would’ve been an undrafted free agent. During his first seven years in the NFL, he backed up guys like Warren Moon, Rich Gannon, and Sean Salisbury in Minnesota, had a one-year stint in the NFL’s World League, and was benched twice by the late Dennis Green (in favor of Randall Cunningham). Following two seasons in Washington (where he was benched again, in favor of notorious team-killer Jeff George), he signed with the Tampa Bay Buccaneers. Like some of the other guys you’ve read about on this list, Johnson was far from a spectacular quarterback, but he got to simply manage a team that boasted one of the most dominant defenses ever assembled.