Pittsburgh Steelers wide receiver Chase Claypool (11) arrives on Thursday, August 5, 2021 in Canton, Ohio.

Dallas Cowboys running back Ezekiel Elliott (21) arrives to the stadium on Thursday, August 5, 2021 in Canton, Ohio.

Dallas Cowboys wide receiver CeeDee Lamb (88) on Thursday, August 5, 2021 in Canton, Ohio.

Pittsburgh Steelers wide receiver Chase Claypool (11) warms up on Thursday, August 5, 2021 in Canton, Ohio.

Dallas Cowboys head coach Mike McCarthy enters the field during an NFL football game against the Pittsburgh Steelers on Thursday, August 5, 2021 in Canton, Ohio. (Ben Liebenberg/NFL)

Dallas Cowboys running back Ezekiel Elliott (21) poses on Thursday, August 5, 2021 in Canton, Ohio.

Dallas Cowboys running back Ezekiel Elliott (21) warms up on Thursday, August 5, 2021 in Canton, Ohio.

Pittsburgh Steelers outside linebacker T.J. Watt (90) greets Pittsburgh Steelers fullback Derek Watt (44) on Thursday, August 5, 2021 in Canton, Ohio.

Dallas Cowboys running back Ezekiel Elliott (21) warms up on Thursday, August 5, 2021 in Canton, Ohio.

Pittsburgh Steelers quarterback Mason Rudolph (2) on Thursday, August 5, 2021 in Canton, Ohio.

Dallas Cowboys wide receiver CeeDee Lamb (88) warms up on Thursday, August 5, 2021 in Canton, Ohio.

Pittsburgh Steelers quarterback Mason Rudolph (2) warms up on Thursday, August 5, 2021 in Canton, Ohio.

Dallas Cowboys group huddle on Thursday, August 5, 2021 in Canton, Ohio.

View of the exterior of the NFL Hall Of Fame before an NFL football game between the Pittsburgh Steelers and Dallas Cowboys on Thursday, August 5, 2021 in Canton, Ohio. (Aaron Doster/NFL)

Dallas Cowboys tight end Dalton Schultz (86) runs with the ball on Thursday, August 5, 2021 in Canton, Ohio.

Dallas Cowboys running back Rico Dowdle (34) runs with the ball on Thursday, August 5, 2021 in Canton, Ohio.

Pittsburgh Steelers cornerback Tre Norwood (21) hold Dallas Cowboys tight end Dalton Schultz (86) on Thursday, August 5, 2021 in Canton, Ohio.

Pittsburgh Steelers quarterback Dwayne Haskins (3) throws the ball on Thursday, August 5, 2021 in Canton, Ohio.

Pittsburgh Steelers running back Anthony McFarland (26) celebrates an interception on Thursday, August 5, 2021 in Canton, Ohio.

Pittsburgh Steelers quarterback Dwayne Haskins (3) celebrates a touchdown on Thursday, August 5, 2021 in Canton, Ohio.

Dallas Cowboys wide receiver Johnnie Dixon (6) runs the ball on Thursday, August 5, 2021 in Canton, Ohio.

Pittsburgh Steelers quarterback Ben Roethlisberger (7) conducts an interview on Thursday, August 5, 2021 in Canton, Ohio.