Every team has questions.

From defending SEC champion Alabama to the Vanderbilt team that went 0-8 in league play, each team in the league has problems to solve in fall camp.

But in the case of a special few that may have more to prove to the league, the questions are louder in volume and more frequent in their asking.

Here are five groups, coaches or players with the most to prove in the 2015:

The Auburn Defense

The flashiest assistant coach hire in college football belongs to Auburn. Bringing in former Florida coach Will Muschamp as the new defensive coordinator was a power play for a team that has proven to have one of the best offenses in the league during the last couple of seasons under Gus Malzahn. But hiring a defensive wizard as the coach doesn’t necessarily make all of your defensive problems go away.

The Tigers defense was really, really bad last season, to the tune of giving up 34 or more points in its last seven games against FBS opponents. If Auburn is going to prove that it is worthy of the preseason College Football Playoff consideration, the Tigers defense must be significantly better in 2015.

Missouri QB Maty Mauk

Perhaps the most polarizing starting quarterback in the SEC right now, Mauk has both an abundance of supporters and detractors. There’s no denying his underlying talent, but Missouri needs more consistent play out of Mauk in 2015. He must prove that he’s able to stand in the pocket occasionally, manage the offense and limit risks (turnovers) in his second full year as the Tigers starter. Among SEC quarterbacks, only Ole Miss QB Bo Wallace (14) threw more interceptions than Mauk’s 13 in 2014.

With two years of eligibility remaining, Missouri fans are looking for Mauk to prove early in the season that he’s the long-term answer. Bringing the offense which finished 70th in the FBS in total scoring in 2014 closer to the No. 13 ranking it earned in 2013 would not only make Mauk a popular man on campus, but would also could produce a third consecutive SEC East title for the Tigers.

Vanderbilt head coach Derek Mason

James Franklin set an unrealistic standard at Vanderbilt with 21 wins in his three seasons, but fair or not, Mason is on the hot seat after turning in a 3-9 season in his 2014 debut.

Among the things Mason must prove, showing he can win a conference game after an 0-8 showing a year ago tops the list. It’s hard to make the case for anyone to keep a job for a third season if they go 0-16 in the league in their first two years. The next thing Mason must prove is that he’s a capable leader and motivator. His team looked lost at times last season, and when things were really rough he looked like a man that would rather be anywhere but present in that moment. That has to change.

Alabama QB Jake Coker

This is the final chance to dance for the former Florida State quarterback. Coker must prove he can be a starting quarterback in the SEC. He was unsuccessful in beating out Blake Sims for the Alabama role in 2014, and now finds himself nursing an injury through a fall-camp battle with at least three other Crimson Tide quarterbacks. For a guy who seemingly transferred because he didn’t want to sit behind former Seminoles QB Jameis Winston, he sure has struggled when given the opportunity in easier competitions.

Georgia head coach Mark Richt and the entire Bulldogs roster

I wanted to put this squarely on Mark Richt’s shoulders, but the players have some ownership as well. The SEC East has been as winnable as ever the last two seasons, and the Bulldogs twice have fallen on their faces in spite of being the consensus division favorite.

In 2013, a loss at Vanderbilt did in Richt and the Bulldogs, and last season it was losses to underwhelming South Carolina and Florida teams that kept Georgia from matching Missouri for a second consecutive year. Richt must prove he’s capable of taking the most talented team in the division and turning it into a division winner once again. And these Bulldogs players must prove they’re capable of avoiding a slip up against an inferior divisional opponent.