Very unlikely a new HC is announced before Thanksgiving if history is an indication:
During the season
Georgia Southern - Clay Helton - 11/2/2021 - USC head coach (2015-2021) - was out of work
Texas Tech - Joey McGuire - 11/8/2021 - Baylor assistant head coach/outside linebackers coach (2020-2021)
FIU - Mike MacIntyre - 11/10/2021 - Memphis defensive coordinator (2020-2021)
UConn - Jim Mora - 11/11/2021 - UConn offensive assistant (2020-2021) - on the staff
UMass - Don Brown - 11/21/2021 - Arizona defensive coordinator (2021)
After the season
Louisiana Tech - Sonny Cumbie - 11/26/2021 - Texas Tech interim head coach, offensive coordinator and quarterbacks coach (2021)
TCU - Sonny Dykes - 11/26/2021 - SMU head coach (2018-2021)
New Mexico State - Jerry Kill - 11/27/2021 - TCU interim head coach and assistant to head coach (2020-2021)
Duke - Mike Elko - 11/28/2021 - Texas A&M defensive coordinator (2018-2021)
Florida - Billy Napier - 11/28/2021 - Louisiana head coach (2018-2021)
USC - Lincoln Riley - 11/28/2021 - Oklahoma head coach (2017-2021)
SMU - Rhett Lashlee - 11/29/2021 - Miami (FL) offensive coordinator and quarterbacks coach (2020-2021)
Temple - Stan Drayton - 11/29/2021 - Texas assistant head coach, running backs coach and run game coordinator (2017-2021)
LSU - Brian Kelly - 11/29/2021 - Notre Dame head coach (2010-2021)
Washington - Kalen DeBoer - 11/29/2021 - Fresno State head coach (2020-2021)
Virginia Tech - Brent Pry - 11/30/2021 - Penn State defensive coordinator (2016-2021)
Colorado State - Jay Norvell - 12/2/2021 - Nevada head coach (2017-2021)
Virginia - Tony Elliott - 12/2/2021 - Clemson assistant head coach and offensive coordinator (2020-2021)
Troy - Jon Sumrall - 12/2/2021 - Kentucky co-defensive coordinator and linebackers coach (2020-2021)
Akron - Joe Moorhead - 12/4/2021 - Oregon offensive coordinator (2020-2021)
Oklahoma - Brent Venables - 12/5/2021 - Clemson assistant head coach and defensive coordinator (2012-2021)
Miami (FL) - Mario Cristobal - 12/6/2021 - Oregon head coach (2018-2021)
Fresno State - Jeff Tedford - 12/8/2021 - Fresno State head coach (2017-2019)
Nevada - Ken Wilson - 12/10/2021 - Oregon co-defensive coordinator and linebackers coach (2020-2021)
Oregon - Dan Lanning - 12/11/2021 - Georgia defensive coordinator (2019-2021)
Hawai?i - Timmy Chang - 1/14/2022 - Nevada wide receivers coach (2021)
During the season
Georgia Southern - Clay Helton - 11/2/2021 - USC head coach (2015-2021) - was out of work
Texas Tech - Joey McGuire - 11/8/2021 - Baylor assistant head coach/outside linebackers coach (2020-2021)
FIU - Mike MacIntyre - 11/10/2021 - Memphis defensive coordinator (2020-2021)
UConn - Jim Mora - 11/11/2021 - UConn offensive assistant (2020-2021) - on the staff
UMass - Don Brown - 11/21/2021 - Arizona defensive coordinator (2021)
After the season
Louisiana Tech - Sonny Cumbie - 11/26/2021 - Texas Tech interim head coach, offensive coordinator and quarterbacks coach (2021)
TCU - Sonny Dykes - 11/26/2021 - SMU head coach (2018-2021)
New Mexico State - Jerry Kill - 11/27/2021 - TCU interim head coach and assistant to head coach (2020-2021)
Duke - Mike Elko - 11/28/2021 - Texas A&M defensive coordinator (2018-2021)
Florida - Billy Napier - 11/28/2021 - Louisiana head coach (2018-2021)
USC - Lincoln Riley - 11/28/2021 - Oklahoma head coach (2017-2021)
SMU - Rhett Lashlee - 11/29/2021 - Miami (FL) offensive coordinator and quarterbacks coach (2020-2021)
Temple - Stan Drayton - 11/29/2021 - Texas assistant head coach, running backs coach and run game coordinator (2017-2021)
LSU - Brian Kelly - 11/29/2021 - Notre Dame head coach (2010-2021)
Washington - Kalen DeBoer - 11/29/2021 - Fresno State head coach (2020-2021)
Virginia Tech - Brent Pry - 11/30/2021 - Penn State defensive coordinator (2016-2021)
Colorado State - Jay Norvell - 12/2/2021 - Nevada head coach (2017-2021)
Virginia - Tony Elliott - 12/2/2021 - Clemson assistant head coach and offensive coordinator (2020-2021)
Troy - Jon Sumrall - 12/2/2021 - Kentucky co-defensive coordinator and linebackers coach (2020-2021)
Akron - Joe Moorhead - 12/4/2021 - Oregon offensive coordinator (2020-2021)
Oklahoma - Brent Venables - 12/5/2021 - Clemson assistant head coach and defensive coordinator (2012-2021)
Miami (FL) - Mario Cristobal - 12/6/2021 - Oregon head coach (2018-2021)
Fresno State - Jeff Tedford - 12/8/2021 - Fresno State head coach (2017-2019)
Nevada - Ken Wilson - 12/10/2021 - Oregon co-defensive coordinator and linebackers coach (2020-2021)
Oregon - Dan Lanning - 12/11/2021 - Georgia defensive coordinator (2019-2021)
Hawai?i - Timmy Chang - 1/14/2022 - Nevada wide receivers coach (2021)
