*Around the NFL's season preview continues with the AFC West *Change we can believe inCan upgrades in the coaching staff make up for lo ses on the roster? That's the question fans are asking following an offseason where VP John Elway made a smart, bold decision to axe coach John Fox and his staff. New coach Gary Kubiak has brought a proven offensive system with a strong running game everywhere he's coached. Defensive coordinator Wade Phillips is an even bigger upgrade and has an extraordinary amount of talent to work with. Phillips usually takes a below-average group and turns them into a top-five unit. The are already a top-five group Michael Carter-Williams Jersey and it's up to Phillips to make them the NFL's best. While the coaches look better, the roster quietly lost a lot of talent: Tight end , guard , defensive tackle , and safety left in free agency. Left tackle was lost to a torn ACL during the offseason, with recent pickup at guard the biggest name to sign with Denver this offseason. This is a loaded roster built to win now, but it's not as loaded as it was a year ago. Biggest Concern's arm didn't look any stronger this preseason. His comfort level in Kubiak's offense is an even bigger i sue. Kubiak's offenses historically don't use the shotgun formation much, and often line up two tight ends or a fullback. That's diametrically opposed to what Manning has been running lately, and the transition to a run-based offense could be tricky for both Manning and Kubiak. Two experienced pros should be able to meet in the middle, but it's fair to expect some bumps along the way. The offensive line is the most worrisome aspect here. It's usually the bedrock of a Kubiak offense, yet the only have one starter returning. Adding Mathis at left guard will help. Rookie will be at left tackle, untested second- Tobias Harris Jersey year pro is at center, and journeyman is at right tackle. Manning was hit a lot in the preseason.Training camp surpriseSome of Denver's recent high draft picks on offense aren't panning out. Running back , the starter early last year, is off the team. has stepped up and could be option 1B behind . The team also seems to be hoping second-year receiver takes a big leap, but there isn't a lot of proof that it's happening. What we'll be saying in FebruaryThe had one of the best teams in the league again, but again fell short of another title. Predicted finish: AFC West champions, No. 3 in AFC, No. 7 in 's Power Poll.