Now I know what you might be saying, yes Blaine Gabbert has two Super Bowl rings, but he got those as a backup quarterback. We all know that Gabbert was drafted to be a starter and Tiger fans had high hopes for his NFL career.
The Jaguars took Gabbert with the tenth pick in the 2011 NFL Draft. In his first season, Gabbert threw just 12 touchdown passes and 11 interceptions. His time as a starter in Jacksonville dwindled with each season before he suddenly was in San Fransisco.
Gabbert moved around in the league quite a bit and accepted his role as a backup, most notably in Tampa Bay for Tom Brady and Kansas City for Patrick Mahomes. However, he was meant to be more than just a backup, so he will top this busts list.