It didn't take but one week for the Vikings to realize their season of defensive transition would be difficult in 2020.Minnesota gave up a whopping 522 yards of total offense to the rival Green Bay Packers in the season opener, a 43-34 lo s that quickly exposed the newfound weakne s of the Vikings' turned-over secondary. What was a small sample size ended up proving to be a precursor of a slog of a season in which the Vikings finished 27th in yards allowed per game and 29th in points allowed per game.Mike Zimmer's team dealt with plenty of lo ses and nece sary on-the-fly adjustments that made for a difficult campaign, and when he took a moment to scan his roster for opportunities to improve late in the season, he ended up "down in the dumps," he recalled Wednesday."I'm not used to that level of performance from one of our groups," Zimmer said. "Honestly, we've had some of the best meetings that I've had in eight years probably. I mean we're di secting every little thing we do, going through everything with a fine-toothed comb. I've been really impre sed with the coaches that are in there. You know, the offenses have changed so much in the last four, five years. It's time that we need to do some things differently and change and adapt. I'm actually really excited. I can't wait to get the players back on the field and get them going."Following the offseason departures of , and , Zimmer turned to to start at one corner and selected from a young pair of corners in and for the other opening. Le s than two months later the oft-injured Hughes was again on injured reserve, and fellow defensive back wasn't able to stay healthy enough to be available, forcing Zimmer to turn to Gladney and Dantzler full-time.That, in itself, would have been a challenge in today's pa s-friendly NFL. But for the Vikings, it only further compounded what was already expected to be a year of transition with anticipated growing pains. Minnesota had said goodbye to longtime defensive stalwarts and in the offseason, and thought it scored a great replacement in , but he fell short of his own expectations before the Vikings shipped him to Baltimore. also mi sed the entire season due to injury, e sentially decimating what was once a strength in Minnesota.Fast forward to March, and Zimmer is feeling much better about his team. Minnesota welcomed Alexander back to the Twin Cities after his one-year stint in Cincinnati, signed veteran corner -- an addition Zimmer called -- picked up defensive tackle and linebacker , and bolstered the edge rush by inking defensive end .