Pac-12's head coach vacancies are likely to grow

FILE - Southern California coach Clay Helton watches warmups on the field before the team's NCAA college football game against Stanford on Sept. 11, 2021, in Los Angeles. Former Southern California coach Helton was hired by Georgia Southern on Tuesday, Nov. 2, to lead the Eagles, seven weeks after he was fired by USC. (AP Photo/Marcio Jose Sanchez, File)

FILE - Washington State head coach Nick Rolovich, center, speaks with officials during the first half of an NCAA college football game against Portland State in Pullman, Wash., on Sept. 11, 2021. Washington Gov. Jay Inslee is disputing Rolovich's statements that the Democrat targeted the former Washington State football coach with his statewide COVID-19 vaccine mandate for all public employees. (AP Photo/Young Kwak, File)

Oregon State head coach Jonathan Smith smiles as he leaves the field after an NCAA college football game against Arizona State, Saturday, Nov. 20, 2021, in Corvallis, Ore. Oregon State defeated Arizona State 24-10. (AP Photo/Andy Nelson)

Utah head coach Kyle Whittingham looks on in the second half during an NCAA college football game against Oregon Saturday, Nov. 20, 2021, in Salt Lake City. (AP Photo/Rick Bowmer)

Stanford coach David Shaw stands on the sideline during the first half of the team's NCAA college football game against California in Stanford, Calif., Saturday, Nov. 20, 2021. (AP Photo/Jed Jacobsohn)

California coach Justin Wilcox, center, stands on the sidelines during the first half of the team's NCAA college football game against Stanford in Stanford, Calif., Saturday, Nov. 20, 2021. (AP Photo/Jed Jacobsohn)

UCLA head coach Chip Kelly yells at a referee during the first half of an NCAA college football game against Southern California Saturday, Nov. 20, 2021, in Los Angeles. (AP Photo/Mark J. Terrill)

Arizona State head coach Herm Edwards watches his team during the third quarter of an NCAA college football game against Oregon State, Saturday, Nov. 20, 2021, in Corvallis, Ore. (AP Photo/Andy Nelson)

Oregon head coach Mario Cristobal shouts in the second half during an NCAA college football game against Utah, Saturday, Nov. 20, 2021, in Salt Lake City. (AP Photo/Rick Bowmer)

FILE - Washington head coach Jimmy Lake yells toward the field in the first half of an NCAA college football game against California, Saturday, Sept. 25, 2021, in Seattle. On Sunday, Nov. 14, 2021, Washington fired Lake less than two years after he was chosen to succeed Chris Petersen. (AP Photo/Elaine Thompson, File)