Every coach has some degree of an angry demeanor to their personality. To deal with players, executives, and the media to name a few contentious groups that encircle a coach’s day-to-day operations, a coach of even the most docile sensibility can get mean when warranted. All of those pressures can be corrosive and wear on the thickest skinned coaches around. In the end, the coach is the scapegoat for his players’ lack of performance and the failure to bring home the championship. Fair or not, that is the nature of the business.

However, there are coaches who come equipped with a very short fuse for all of the nonsense that comes with the title. They are the ones that patrol the sidelines, dugouts, and benches with a storm cloud brewing behind their scowling expressions, waiting to explode in a fit of rage at a moment’s notice. Players and referees alike are not safe from their wrath. The rampage does not remain isolated to the field of play. The media incurs the brunt of that game’s frustrations in the inane ritual known as the postgame press conference. After the most frustrating of games, it is no secret what the gathered media will get in return for their queries: fiery retorts and golden sound-bites abound.

The coaches on this list are among the angriest in the profession today. They work on everyone’s last nerve as much as they are developing their own peptic ulcers through all of their rage. Some are successful in spite of their volatility and others are known more for their outbursts than wins and losses. Regardless, these fifteen coaches have made this list due to their fiery nature first and foremost.

10. Rob Ryan - New Orleans Saints

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The only assistant coach to crack the list, the other Ryan twin is just like his brother Rex - if he were a hard-drinking, fishing boat captain sailing off the Alaskan coast somewhere. While he is not as verbose as his brother, Rob has burned many bridges as a defensive coordinator at various stops around the league. Rob has butted heads numerous times with Saints head coach Sean Payton in 2014 over New Orleans’ leaky defense. The common thread is the Ryan charm of making more enemies than friends. The evil twin may soon find himself in the unemployment line with his brother. Coordinators should be seldom seen, but Ryan is unavoidable for the flowing locks he displays as part of his angry renegade image.

9. Gregg Popovich - San Antonio Spurs

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“Pop” looks professorial and rightfully so. Overseeing one of the most technically sound trios in Tim Duncan, Manu Ginobili, and Tony Parker, the Spurs head coach can teach a master class on how to efficiently run an NBA dynasty. Now that those three are in the twilight of their careers, Popovich knows better than to use up his best weapons against lesser opponents. For that, he has been thoroughly criticized and has responded like a bitter professor counting down the days until his pension kicks in. Having earned the right to manage his stars the way he sees fit, Popovich has added curmudgeon to the adjectives assigned to him.