USC Trojans cornerback Iman Marshall (8) in the first half of an NCAA college football game Saturday, Nov. 11, 2017, in Boulder, Colo. (AP Photo/David Zalubowski)

Southern California defensive back Iman Marshall runs a play during the second half of an NCAA college football game against California, Thursday, Oct. 27, 2016, in Los Angeles. USC won 45-24. (AP Photo/Mark J. Terrill)

Southern California cornerback Iman Marshall gets set for a play during the second half of an NCAA college football game against UNLV Saturday, Sept. 1, 2018, in Los Angeles. USC won 43-21. (AP Photo/Mark J. Terrill)

Southern California defensive back Iman Marshall gets set to run a play during the second half of an NCAA college football game against UCLA, Saturday, Nov. 19, 2016, in Pasadena, Calif. Southern California won 36-14. (AP Photo/Mark J. Terrill)

Southern California defensive back Iman Marshall (8) during the second half of an NCAA college football game against Arizona, Saturday, Oct. 15, 2016, in Tucson, Ariz. Southern California defeated Arizona 48-14. (AP Photo/Rick Scuteri)

Southern California cornerback Iman Marshall runs a play during the second half of an NCAA college football game against UNLV Saturday, Sept. 1, 2018, in Los Angeles. USC won 43-21. (AP Photo/Mark J. Terrill)

Southern California cornerback Iman Marshall gets ready to run a play during the second half of an NCAA college football game against Texas, Saturday, Sept. 16, 2017, in Los Angeles. USC won 27-24 in overtime. (AP Photo/Mark J. Terrill)

North defensive back Iman Marshall of USC (24) during the second half of the Senior Bowl college football game, Saturday, Jan. 26, 2019, in Mobile, Ala. (AP Photo/Butch Dill)

Southern California cornerback Iman Marshall (8) during the first half of an NCAA college football game against Colorado Saturday, Oct. 13, 2018, in Los Angeles. (AP Photo/Marcio Jose Sanchez)

Trojan Football defeats the visiting Texas Longhorns in double overtime.

Southern California cornerback Iman Marshall gets set to run a play during the second half of an NCAA college football game against Notre Dame Saturday, Nov. 24, 2018, in Los Angeles. Notre Dame won 24-17. (AP Photo/Mark J. Terrill)

Southern California cornerback Iman Marshall (8) during the first half of an NCAA college football game against Colorado Saturday, Oct. 13, 2018, in Los Angeles. (AP Photo/Marcio Jose Sanchez)

Southern California cornerback Iman Marshall (8), with head coach Clay Helton, right, after Marshall is called for an unsportslike penalty, to extend a drive for California during the second half of an NCAA college football game in Los Angeles, Saturday, Nov. 10, 2018. (AP Photo/Alex Gallardo)

Trojan Football defeats the visiting Texas Longhorns in double overtime.

USC Football opens up conference play with a visit to Palo Alto, CA to take on the Stanford Cardinal.

Southern California cornerback Iman Marshall runs a play during the second half of an NCAA college football game against Notre Dame Saturday, Nov. 24, 2018, in Los Angeles. Notre Dame won 24-17. (AP Photo/Mark J. Terrill)