With linebacker with a left knee injury, Denver waves goodbye to its leading tackler from a season ago.In his absence, is slated to serve as the team's new weakside linebacker. The second-year defender and former fifth-round draft pick of the feels at home in Denver's defense after joining last year's active roster when All-Pro pa s rusher tore his ACL."Now, , I have a couple of years in the league, so I know what the NFL is about," Marshall said, per the team's official website. "So I'm definitely ready if the time was to come."The team also can turn to Kawhi Leonard Jersey , a middle linebacker on the depth chart who plays his share of outside snaps in practice."(Linebackers) coach (Richard) Smith and coach (Jack) Del Rio, they've been cro s-training us," Barrow said. "We've all been learning all of the positions."That versatility is a plus, but neither Marshall nor Barrow have registered an NFL start. Denver can't make up for Trevathan's every-down presence as a strong cover man who did an outstanding job stuffing the run last season.Still, the additions of hard-hitting safety , rugged cornerback and pa s-rusher bring power to a lineup that started 6-0 without Miller one season ago.Said coach of the lo s of Trevathan: "We'll hold down the fort until he gets back."The latest highlights the from the first week of preseason action. Tobias Harris Jersey