Clemson LB Isaiah Simmons Runs Official 4.39 Second 40-Yard Dash at the NFL Combine

Clemson Tigers linebacker Isaiah Simmons runs an official 4.39 second 40-yard dash at 2020 NFL Scouting Combine.

Watch Baylor Bears wide receiver Denzel Mims' 2020 NFL Scouting Combine workout.

Baylor wide receiver Denzel Mims runs an official 4.38 40-yard dash at 2020 combine.

Watch Louisville Cardinals offensive lineman Mekhi Becton's full 2020 NFL Scouting Combine workout.

Louisville Cardinals offensive lineman Mekhi Becton runs an official 5.10 second 40-yard dash at the 2020 NFL Scouting Combine.

Utah Utes defensive back Javelin K. Guidry runs an official 4.29 second 40-yard dash at 2020 NFL Scouting Combine.

Watch the best workouts from the defensive back group at the 2020 NFL Scouting Combine.

Florida Gators defensive back C.J. Henderson's 2020 NFL Scouting Combine workout.

Clemson Tigers defensive back A.J. Terrell runs an official 4.42 second 40-yard dash at the 2020 NFL Scouting Combine.

Florida Gators cornerback CJ Henderson runs an unofficial 4.39 second 40-yard dash at the 2020 NFL Scouting Combine.

LSU Tigers cornerback Kristian Fulton runs an unofficial 4.47 second 40-yard dash at the 2020 NFL Scouting Combine.

Watch the best moments from the linebackers at the 2020 NFL Scouting Combine.

Watch the best moments from the defensive line at the 2020 NFL Scouting Combine.

Iowa Hawkeyes defensive lineman A.J. Epenesa's 2020 NFL Scouting Combine workout.

Watch the best of the offensive linemen during the 2020 NFL Scouting Combine.

Watch the best moments from the running backs at the 2020 NFL Scouting Combine.

Watch Alabama Crimson Tide offensive lineman Jedrick Wills Jr.'s full 2020 NFL Scouting Combine workout.

Iowa Hawkeyes offensive lineman Tristan Wirfs' 2020 NFL Scouting Combine workout.

Georgia Bulldogs offensive lineman Andrew Thomas runs an official 5.22 second 40-yard dash at the 2020 NFL Scouting Combine.

Houston Cougars offensive lineman Josh Jones runs an official 5.27 second 40-yard dash at the 2020 NFL Scouting Combine.

Michigan Wolverines offensive lineman Cesar Ruiz runs an official 5.08 second 40-yard dash at the 2020 NFL Scouting Combine.

Iowa Hawkeyes offensive tackle Tristan Wirfs runs an official 4.85 second 40-yard dash at the 2020 NFL Scouting Combine.

Iowa Hawkeyes offensive lineman Tristan Wirfs gets UP on an unofficial 36.5" vertical jump.

Louisville Cardinals offensive tackle Mekhi Becton shows his change of direction in drill at the 2020 NFL Scouting Combine

Iowa Hawkeyes offensive tackle Tristan Wirfs puts up 24 reps on the bench press at the 2020 NFL Scouting Combine.