The Milwaukee Bucks came into the 2015-16 season ready to make some noise. They showed great promise last year by making the playoffs as the No. 6 seed in the Eastern Conference before falling against the Chicago Bulls in a hard-fought six-game series.

Their 2014 No. 2 overall pick, Jabari Parker, returned from a torn ACL that forced him to miss all but 25 games as a rookie. They also signed former Detroit Pistons’ big man Greg Monroe in the offseason to a three-year max deal worth $50 million. Coming into this year with the second-youngest team in the league, the Bucks appeared ready to take a leap.

Fast forward through 29 games of the newest campaign, and the Bucks sit 13th in the Eastern Conference with a pitiful record of 11-18. The only teams below them are the Brooklyn Nets and Philadelphia 76ers, both teams tanking for a lottery pick. So what happened to the once-promising Bucks?

Quite frankly, they can’t stop other teams from scoring. Comparing their 2014 season stats to 2015, we can see that in almost all facets of the game, the Bucks have regressed. This is especially evident in the points allowed category. Last season, the Bucks were considered a top-ten defense, giving up only 97.4 points per game. Milwaukee used its size, speed, length and athleticism to frustrates opponents and force them to take tough shots. However, with almost the same roster, the Bucks have given up five more points per game.

Not only are the Bucks allowing more points on average, but the offense isn’t keeping up. The Bucks are the fourth worst team in point differentials at -6.07, meaning that on average the Bucks lose games by approximately six points.

A deeper look into Milwaukee’s defensive stats explains why the Bucks are giving up more points and ultimately losing more games. The Bucks have the third-slowest pace in the league, meaning they see the third-fewest possessions per game. Scaling each teams points allowed per game by 100 possessions (otherwise known as defensive rating), Milwaukee lands third last, surrendering 109.18 points per 100 possessions.

So how are opponents scoring with such ease against Milwaukee? The most outlying factor is Milwaukee’s rebounding. The Bucks are the worst rebounding team in the entire league, which causes teams to score particularly well in two aspects of the game: second chance points from offensive rebounds and fastbreak points from defensive rebounds. The Bucks land in the bottom five in points allowed in both of these categories.

For a team with a lot of length, they are giving up the most rebounds. For a team with a lot of athleticism, they are giving up a high volume of fastbreak points. And for a team with a lot of talent, they are giving up one of the worst point differentials in the league. The Bucks defense has experienced a complete 180 in terms of efficiency, despite having a similar roster and coaching staff. This shift is one of the most bizarre subplots of the 2015-16 season thus far.