They will be the cornerstones of a defense that has been almost completely overhauled over the past couple of years -- and may not have strong safety Troy Polamalu and cornerback Ike Taylor beyond the 2014 season.
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Shazier, the Steelers' first-round pick this year, has the look of a future Pro Bowler, and he did well during the offseason practices. The key for the former Ohio State star is continuing that in training camp when the pads go on and the hitting starts.
Jones, the team's first-round pick in 2013, is a crucial part of the Steelers' future given how vital it is that their outside linebackers generate a consistent pass rush. Jones struggled while learning the Steelers' defense on the job last season and recorded just one sack despite starting eight games.
He will be better this season, especially with former Steelers great Joey Porter mentoring him, but will Jones establish himself as a premier pass-rusher over the next couple of seasons?
The 6-foot-6, 312-pound Tuitt already has an NFL body, and the 2014 second-round pick will make a nice pairing with defensive end Cameron Heyward if he realizes the potential that has the Steelers so excited about him.
The hard-hitting Thomas is the likely successor to Polamalu, and the Steelers have high hopes for the 2013 fourth-round pick.
Pittsburgh also needs to develop some cornerbacks. The Steelers would love nothing more than if rookie Shaquille Richardson, a fifth-round pick, becomes their latest midround find at the position.
Cornerback may also be the Steelers' top priority in the 2015 NFL draft after many thought they would use a high pick on one this year.