The Carolina Panthers had first dibs on the waiver wire Wednesday and wasted no time making additions to their roster. Carolina claimed six players off waivers: Linebacker Jamie Sheriff (Seattle Seahawks), cornerback Shemar Bartholomew (New York Jets), cornerback Keenan Isaac (Tampa Bay Buccaneers), cornerback Tariq Castro-Fields (Washington Commanders), offensive tackle Jarrett Kingston (San Francisco 49ers) and linebacker Jon Rhattigan (Seahawks). The Panthers also signed veteran cornerback Lonnie Johnson Jr. to their practice squad. Carolina has the intention of elevating him for Week 1 aga…