ENGLEWOOD, Colo. -- The Denver Broncos got a glimpse Thursday of what things would be like if All-Pro linebacker Von Miller has to sit out all of September. Miller skipped the final day of training camp to address his looming suspension for violating the NFLs drug-abuse policy, although ESPN reported that his appeals hearing was postponed. League spokesman Greg Aiello told The Associated Press that the league was not at liberty to comment on the matter. Nonetheless, with their 24-year-old star absent, third-year pro Nate Irving lined up at Millers strongside spot in the base defence at practice with free agent newcomer Shaun Phillips playing Millers rush end role in the nickel. They did fine, but make no mistake, Miller was missed. "When you lose a guy of that calibre, youre going to notice a difference," Champ Bailey said. "Hes just that effective on our defence. I think you would notice a lot more difference in a game-type situation. Von, hopefully we have him back sooner than later." This is, after all, the man Broncos Executive Vice-President John Elway calls the most talented football player hes ever seen. Miller has collected 30 sacks in his two pro seasons, including a franchise-record 18 1/2 last season, when he was voted runner-up for the NFLs Defensive Player of the Year award after being named the leagues top defensive rookie in 2011. A four-game suspension for Miller would leave a gaping hole in Denvers defence when the Broncos kick off the 2013 season at home Sept. 5 against Super Bowl champion Baltimore. Despite the spectre of a suspension hanging over him, Miller had a terrific training camp, practicing with the starters in hopes he could win his appeal. The Broncos have worked on various contingency plans but Millers absence Thursday presented them with their most extensive work yet on a backup plan in case he is banished from their facilities starting Aug. 30. "Were prepared for any possible scenario," Peyton Manning said. "Thats how you have to be. If you get all wrapped up into one outcome and it doesnt end up turning out that way, you dont really have a Plan B. Today was a good practice on the possibility that he may not be here. If thats the case, thats not going to be an excuse for our team and we have to find a way to do our job. But we certainly hope that he is here." Millers troubles were exacerbated Sunday when he was arrested at a firearms shop near the Broncos practice facility on a warrant for failing to appear in court on Dec. 31 for an October traffic stop in which he was charged with careless driving and not having a license or proof of insurance. Bailey said the mounting troubles might make it seem like Miller is a bad apple but he insisted hes a good guy who just needs to grow up. "Hes young. Things happen and its a process," Bailey told the AP. "We all go through something like this in our life, whether good, bad, something to help you kind of take ownership and responsibility for whats going on around you and just make you more aware. And I think this is only going to make him a better person in the end. "Hes not bad now, but hell be even better in the future," Bailey said. "Well get through this together and well bounce back from it." Notes: C.J. Anderson, an undrafted rookie RB from Cal, seriously injured his right knee during 11-on-11 drills and was carted off the field. "Its tough. He was having such a great camp," Bailey said. Anderson screamed in pain when he got caught in a pile of linemen. With RB Knowshon Moreno (knee) sitting out practice again, the Broncos are thin in the backfield and coach John Fox said he might have to bring in another running back for the exhibition game at Seattle on Saturday night. ... 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