The Johnny Unitas Watch List contains some QB transfers. Some are graduate transfers, some went the Community College route from the school with whom they signed and some sat out a year as well as a few who went from FCS to FBS.
Graduate transfers include:
Keller Chryst - from Stanford to Tennessee
K.J. Carta-Samuels - from Wash to Colorado St
Ryan Finley - from Boise St to NC St
Gardner Minshew - from East Carolina U. (began at a CC) to Washington St
James Morgan - from Bowling Green to FIU (graduated in three years, pre-law, 3.88)
Marcus McMaryion - from Oregon St to Fresno St
Brady White - from Arizona St to Memphis
Shea Patterson received an exemption - from Ole Miss to Michigan
Sitting out a year:
Will Grier (2016) - from Florida to West Virginia
Jarrett Stidham (2016) - from Baylor to Auburn
From FBS to CC to FBS:
Bryce Perkins - from Ariz St to Ariz W. CC to Virginia (ranked #4 in JC dual threat QB)
Ty Gangi - from Colorado to CC to Nevada
Justin Hansen - from Okla to CC to Arkansas St
Kyle Kempt - from Ore St to CC to Iowa St
Jake Luton - from Idaho to CC to Ore St
From CC without signing to FBS school:
Jordan Ta'amu - Ole Miss (started five games over Patterson)
From FCS:
Hasaan Klugh - from NC A&T to Charlotte
Alex Thomson - from Wagner to Marshall
Arizona State and Oregon State have both had significant turnovers in QBs they have recruited.
For Oregon State (Signing years in parentheses):
When Jake Luton (2017, originally from Idaho via CC) won the starting job after spring practices, Marcus Maryion (2014) became a graduate transfer to Fresno St. Kyle Kempt (2013) is a graduate transfer to Iowa St. Seth Collins (2015) was switched to WR. Mason Moran (2016) was switched to Safety. Aidan Willard (2017) redshirted and is fourth string. Jack Colleto (2018 from CC) is second string, but battling for starter in fall camp. Conor Blount (a former walkon) is third string.
(Note: Blake Barnett has transferred again from Arizona St, having transferred from Alabama to ASU, and will be at USF. He is a graduate transfer.)
247 Dual threat QB rankings Junior College, 2018
On that note, LSU has just lost two scholarship QBs to transfers within 24 hours. The starting job goes to Ohio State graduate transfer QB Joe Burrows with last year's backup Myles Brennan the only other scholarship QB.
QB Justin McMillan announces transfer from LSU, Tigers down to 2 scholarship QBs