Slovis, St. Brown help No. 16 USC rout Washington State

Southern California wide receiver Amon-Ra St. Brown (8) reacts after catching a pass in the end zone for a touchdown down against Washington State in the first half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (Keith Birmingham/The Orange County Register via AP)

Southern California wide receiver Amon-Ra St. Brown (8) runs for a first down against Washington State in the second half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (Keith Birmingham/The Orange County Register via AP)

Southern California safety Talanoa Hufanga (15) leaps over Washington State quarterback Jayden de Laura (4) after intercepting a pass in the first half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (Keith Birmingham/The Orange County Register via AP)

Southern California wide receiver Amon-Ra St. Brown (8) catches a pass in the end zone for a touchdown over Washington State defensive back Derrick Langford (2) in the first half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (Keith Birmingham/The Orange County Register via AP)

Southern California wide receiver Amon-Ra St. Brown, right, runs past Washington State defensive back Armani Marsh to score during the first half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (AP Photo/Alex Gallardo)

Southern California wide receiver Amon-Ra St. Brown, left, catches a touchdown pass against Washington State defensive back Derrick Langford during the first half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (AP Photo/Alex Gallardo)

Washington State quarterback Jayden de Laura (4) scrambles against Southern California in the first half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (Keith Birmingham/The Orange County Register via AP)

Southern California running back Kenan Christon (23) runs for a first down past Washington State defensive end Brennan Jackson (80) in the first half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (Keith Birmingham/The Orange County Register via AP)

Southern California quarterback Kedon Slovis (9) looks to pass against Washington State in the first half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (Keith Birmingham/The Orange County Register via AP)

Southern California quarterback Kedon Slovis (9) passes against Washington State in the first half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (Keith Birmingham/The Orange County Register via AP)

Southern California wide receiver Amon-Ra St. Brown, right, celebrates a touchdown catch with wide receiver Tyler Vaughns during the first half of an NCAA college football game against Washington State in Los Angeles, Sunday, Dec. 6, 2020. (AP Photo/Alex Gallardo)

Southern California wide receiver Amon-Ra St. Brown, right, catches a touchdown over Washington State defensive back Armani Marsh during the first half of an NCAA college football game in Los Angeles, Sunday, Dec. 6, 2020. (AP Photo/Alex Gallardo)