Here is the last 3 years on coaching hires and how they fared.
2016
Dino Babers, Syracuse 4-8 to 4-8
Matt Campbell, Iowa State 3-9 to 3-9
Justin Fuente, Virginia Tech 7-6 to 10-4
Bronco Mendenhall, Virginia 4-8 to 2-10
Mark Richt, Miami 8-5 to 9-4
Kirby Smart, Georgia 10-3 to 8-5
Chris Ash, Rutgers 4-8 to 2-10
Tracy Claeys, Minnesota 6-7 to 9-4
Barry Odom, Missouri 5-7 to 4-8
DJ Durkin, Maryland 3-9 to 6-7
Clay Helton, USC 8-6 to 10-3
Will Muschamp, South Carolina 3-9 to 6-7
Kalani Sitake, BYU 9-4 to 9-4
Lovie Smith, Illinois 5-7 to 3-9
Willie Fritz, Tulane 3-9 to 4-8
Scott Frost, UCF 0-12 to 6-7
Mike Viator, Louisiana-Monroe 2-11 to 4-8
Everett Withers, Texas State 3-9 to 2-10
Jay Hopson, Southern Miss 9-5 to 7-6
Mike Norvell, Memphis 9-4 to 8-5
Jason Candle, Toledo 10-2 to 9-4
Mike Neu, Ball State 3-9 to 4-8
Frank Wilson, UTSA 3-9 to 6-7
Seth Littrell, North Texas 1-11 to 5-8
Nick Rolovich, Hawaii 3-10 to 7-7
Tyson Summers, Georgia Southern 9-4 to 5-7
Mike Jinks, Bowling Green 10-4 to 4-8
Scottie Montgomery, East Carolina 5-7 to 3-9
2015
Jim Harbaugh, Michigan 5-7 to 10-3
Chad Morris, SMU 1-11 to 2-10
Pat Narduzzi, Pitt 6-7 to 8-5
Tom Herman, Houston 8-5 to 13-1
Gary Andersen, Oregon State 5-7 to 2-10
Paul Chryst, Wisconsin 11-3 to 10-3
Philip Montgomery, Tulsa 2-10 to 6-7
Jim McElwain, Florida 7-5 to 10-4
Mike Bobo, Colorado State 10-3 to 7-6
Mike Riley, Nebraska 9-4 to 6-7
Dave Beaty, Kansas 3-9 to 0-12
Neal Brown, Troy 3-9 to 4-8
Lance Leipold, Buffalo 5-6 to 5-7
Tony Sanchez, UNLV 2-11 to 3-9
2014
Charlie Strong, Texas 8-5 to 6-7
Willie Fritz, Georgia Southern to 7-4 to 9-3
Mark Whipple, UMass 1-11 to 3-9
Steve Sarkisian, USC 10-4 to 9-4
James Franklin, Penn State 7-5 to 7-6
Chris Creighton, Eastern Michigan 2-10 to 2-10
Chuck Martin, Miami (Ohio) 0-12 to 2-10
Bill Clark, UAB 2-10 to 6-6
Bobby Petrino, Louisville 12-1 to 9-4
Chris Petersen, Washington 9-4 to 8-6
Jeff Monken, Army 3-9 to 4-8
Charlie Partridge, Florida Atlantic 6-6 to 3-9
Derek Mason, Vanderbilt 9-4 to 3-9
Craig Bohl, Wyoming 5-7 to 4-8
Jeff Brohm, Western Kentucky 8-4 to 8-5
Bryan Harsin, Boise State 8-5 to 12-2
Bob Diaco, Uconn 3-9 to 2-10
Blake Anderson, Arkansas State 8-5 to 7-6
Dino Babers, Bowling Green 10-4 to 8-6
Dave Clawson, Wake Forest 4-8 to 3-9
(Hopefully all the numbers are correct.)