Southern California offensive tackle Austin Jackson (73) in the first half during an NCAA college football game against Arizona, Saturday, Sept. 29, 2018, in Tucson, Ariz. (AP Photo/Rick Scuteri)

Southern California offensive tackle Austin Jackson (73) in the first half during an NCAA college football game against Arizona, Saturday, Sept. 29, 2018, in Tucson, Ariz. (AP Photo/Rick Scuteri)

Iowa defensive end A.J. Epenesa (94) works against Southern California offensive tackle Austin Jackson (73) during the first half of the Holiday Bowl NCAA college football game Friday, Dec. 27, 2019, in San Diego. (AP Photo/Orlando Ramirez)

Southern California offensive tackle Austin Jackson looks on during the second half of the Holiday Bowl NCAA college football game against Iowa Friday, Dec. 27, 2019, in San Diego. Iowa won 49-24. (AP Photo/Orlando Ramirez)

Southern California offensive tackle Austin Jackson (73) looks on from the bench during the second half of the Holiday Bowl NCAA college football game against Iowa Friday, Dec. 27, 2019, in San Diego. Iowa won 49-24. (AP Photo/Orlando Ramirez)

Iowa defensive end A.J. Epenesa, left, is blocked by Southern California offensive tackle Austin Jackson (73) during the first half of the Holiday Bowl NCAA college football game Friday, Dec. 27, 2019, in San Diego. (AP Photo/Orlando Ramirez)

USC offensive lineman Austin Jackson runs a drill at the NFL football scouting combine in Indianapolis, Friday, Feb. 28, 2020. (AP Photo/Michael Conroy)

USC tackle Austin Jackson runs a drill during the 2020 NFL Scouting Combine, Friday, Feb. 28, 2020 in Indianapolis. (Ben Liebenberg via AP)

USC offensive lineman Austin Jackson runs a drill at the NFL football scouting combine in Indianapolis, Friday, Feb. 28, 2020. (AP Photo/Michael Conroy)

Southern California offensive lineman Austin Jackson participates in a drill during the NFL football scouting combine, Friday, Feb. 28, 2020, in Indianapolis. (Aaron M. Sprecher via AP)

USC offensive lineman Austin Jackson runs a drill at the NFL football scouting combine in Indianapolis, Friday, Feb. 28, 2020. (AP Photo/Michael Conroy)

USC offensive lineman Austin Jackson runs a drill at the NFL football scouting combine in Indianapolis, Friday, Feb. 28, 2020. (AP Photo/Michael Conroy)

Southern California offensive lineman Austin Jackson runs the 40-yard dash during the NFL football scouting combine, Friday, Feb. 28, 2020, in Indianapolis. (Aaron M. Sprecher via AP)

USC offensive lineman Austin Jackson runs a drill at the NFL football scouting combine in Indianapolis, Friday, Feb. 28, 2020. (AP Photo/Michael Conroy)

USC offensive lineman Austin Jackson runs the 40-yard dash at the NFL football scouting combine in Indianapolis, Friday, Feb. 28, 2020. (AP Photo/Charlie Neibergall)

USC offensive lineman Austin Jackson runs a drill at the NFL football scouting combine in Indianapolis, Friday, Feb. 28, 2020. (AP Photo/Michael Conroy)

USC offensive lineman Austin Jackson speaks during a press conference at the NFL football scouting combine in Indianapolis, Wednesday, Feb. 26, 2020. (AP Photo/Michael Conroy)

Southern California offensive lineman Austin Jackson runs the 40-yard dash during the NFL football scouting combine, Friday, Feb. 28, 2020, in Indianapolis. (Aaron M. Sprecher via AP)

USC offensive lineman Austin Jackson speaks during a press conference at the NFL football scouting combine in Indianapolis, Wednesday, Feb. 26, 2020. (AP Photo/Michael Conroy)

Iowa defensive end A.J. Epenesa (94) works against Southern California offensive tackle Austin Jackson (73) during the first half of the Holiday Bowl NCAA college football game Friday, Dec. 27, 2019, in San Diego. (AP Photo/Orlando Ramirez)

Southern California offensive lineman Austin Jackson speaks to the media during a press conference at the NFL football scouting combine, Wednesday, Feb. 26, 2020, in Indianapolis. (Aaron M. Sprecher via AP)

Iowa defensive end A.J. Epenesa (94) works against Southern California offensive tackle Austin Jackson (73) during the first half of the Holiday Bowl NCAA college football game Friday, Dec. 27, 2019, in San Diego. (AP Photo/Orlando Ramirez)

Iowa defensive end A.J. Epenesa (94) works against Southern California offensive tackle Austin Jackson (73) during the first half of the Holiday Bowl NCAA college football game Friday, Dec. 27, 2019, in San Diego. (AP Photo/Orlando Ramirez)

Iowa defensive end A.J. Epenesa (94) works against Southern California offensive tackle Austin Jackson (73) during the first half of the Holiday Bowl NCAA college football game Friday, Dec. 27, 2019, in San Diego. (AP Photo/Orlando Ramirez)

Iowa defensive end A.J. Epenesa (94) works against Southern California offensive tackle Austin Jackson (73) during the first half of the Holiday Bowl NCAA college football game Friday, Dec. 27, 2019, in San Diego. (AP Photo/Orlando Ramirez)

Iowa defensive end A.J. Epenesa (94) works against Southern California offensive tackle Austin Jackson (73) during the first half of the Holiday Bowl NCAA college football game Friday, Dec. 27, 2019, in San Diego. (AP Photo/Orlando Ramirez)

Iowa defensive end A.J. Epenesa (94) works against Southern California offensive tackle Austin Jackson (73) during the first half of the Holiday Bowl NCAA college football game Friday, Dec. 27, 2019, in San Diego. (AP Photo/Orlando Ramirez)

USC tackle Austin Jackson poses for a portrait during the 2020 NFL Scouting Combine, Wednesday, Feb. 26, 2020 in Indianapolis. (Todd Rosenberg via AP)

USC tackle Austin Jackson poses for a portrait during the 2020 NFL Scouting Combine, Wednesday, Feb. 26, 2020 in Indianapolis. (Todd Rosenberg via AP)

USC tackle Austin Jackson poses for a portrait during the 2020 NFL Scouting Combine, Wednesday, Feb. 26, 2020 in Indianapolis. (Todd Rosenberg via AP)

USC tackle Austin Jackson poses for a portrait during the 2020 NFL Scouting Combine, Wednesday, Feb. 26, 2020 in Indianapolis. (Todd Rosenberg via AP)

USC tackle Austin Jackson poses for a portrait during the 2020 NFL Scouting Combine, Wednesday, Feb. 26, 2020 in Indianapolis. (Todd Rosenberg via AP)

USC tackle Austin Jackson poses for a portrait during the 2020 NFL Scouting Combine, Wednesday, Feb. 26, 2020 in Indianapolis. (Todd Rosenberg via AP)

USC tackle Austin Jackson poses for a portrait during the 2020 NFL Scouting Combine, Wednesday, Feb. 26, 2020 in Indianapolis. (Todd Rosenberg via AP)

USC tackle Austin Jackson poses for a portrait during the 2020 NFL Scouting Combine, Wednesday, Feb. 26, 2020 in Indianapolis. (Todd Rosenberg via AP)

USC tackle Austin Jackson poses for a portrait during the 2020 NFL Scouting Combine, Wednesday, Feb. 26, 2020 in Indianapolis. (Todd Rosenberg via AP)