Defensive tackles under contract (all cap hit information from Spotrac):
Kawann Short, cap hit of $17,000,000
Dontari Poe, cap hit of $5,333,333
Vernon Butler, cap hit of $2,289,958
Kyle Love, cap hit of $1,200,000
Kawaan Short is obviously the entrenched starter at defensive tackle on a monster deal. Former Falcon Dontari Poe was brought on after the loss of Star Lotulelei to the Bills and he should be an upgrade, even on a smaller deal than Buffalo gave Lotulelei.
Vernon Butler, the Panthers first-round pick two drafts back, looks to improve upon a couple of lackluster first seasons and be a bigger part of the rotation, while Kyle Love is a solid contributor as well.
Defensive tackle is possibly the strongest position on the Panthers roster, as far as starters and depth.