John Fassel: Core Four Contributors

'Hard Knocks': Trevon Diggs' son finally gets to meet Dallas Cowboys QB Dak Prescott.

'Hard Knocks': Micah Parsons prepares for his first NFL game with DeMarcus Ware.

"Hard Knocks": Amari Cooper, Trevon Diggs go head-to-head at practice.

Watch this HBO's "Hard Knocks" preview of Dallas Cowboys quarterback Dak Prescott pitching his new tailgate game idea.

Garrett Gilbert talked about the snaps he'll get in Sunday's preseason finale against Jacksonville, and how things might be different with quarterbacks coach Doug Nussmeier calling the plays.

Guard Zack Martin discusses quarterback Dak Prescott's return to team drills and the offensive line's reps together as they prepare for Week 1 against Tampa Bay.

Jaylon Smith spoke with reporters about the talent and experience in the Cowboys' linebacker room, and how they help each other.

Quarterback Cooper Rush discusses the importance of Sunday's preseason finale as the competition for the backup QB job continues.

Head coach Mike McCarthy updates the injury status of his team including tackles Tyron Smith and La'el Collins as the Cowboys wrap up training camp before hosting the Jacksonville Jaguars in the preseason finale.

Rookie running back JaQuan Hardy discusses his opportunity to finish up preseason competing for a roster spot in Sunday's game against Jacksonville.

Rookie Nahshon Wright discusses the strong competition at the cornerback position in training camp as he looks toward Sunday's preseason finale against Jacksonville.

Wide receiver Cedrick Wilson explains his decision to wear No. 1 this season and rookie linebacker Micah Parsons taking over Wilson's old No. 11.

Defensive coordinator Dan Quinn explains how he entered COVID-19 protocol before last Saturday's game and says he's feeling better now.

Offensive coordinator Kellen Moore discusses how quarterback Dak Prescott looked Wednesday in his first team drill reps since suffering a shoulder strain at the start of training camp.

Special teams coordinator John Fassel discusses kicker Greg Zuerlein's ramp-up toward Week 1 now that he's returned to practice from the Active/PUP list.

Kicker Greg Zuerlein shares his thoughts on making his return from the PUP list and resuming his full-time kicking duties.

Rookie linebacker Jabril Cox has joined a deep and talented linebacker group, but he's making progress with the reps he's getting in his first training camp and preseason.

UDFA fullback Nick Ralston shares his story from growing up a Cowboys fans as a kid to having a chance to make the 53-man roster.

Running back Ezekiel Elliott shares his thoughts on the return of QB Dak Prescott to team drills at practice, the team's quality of work in the Texas heat and more.

Head coach Mike McCarthy updates the teams COVID list after after two more players were added, as well providing injury updates for QB Dak Prescott and more.

Cornerback Trevon Diggs shares his thoughts on the competition level durning training camp amongst the defensive backs and going against the Cowboys wide receiver group.

Blake Jarwin talked with reporters Tuesday about his first preseason action and the process of getting a feel for the game after nearly a year away from the field.

Michael Gallup shared some of his memories of Dak Prescott as a leader and what the Cowboys' quarterback brings to the huddle.

DE DeMarcus Lawrence talks about his goals for the season and more as he prepares to make his return for full participation.

Watch the full episode of "Hard Knocks" following the Dallas Cowboys on HBO and HBO Max at 10 p.m. ET Tuesday.