8. John Kuester

Team(s): Detroit Pistons
Tenure: 2009-2011
Overall Record: 57-107

The once storied Detroit Pistons franchise went from perennial title contenders under Flip Saunders to Eastern Conference bottom-feeders in two seasons after Brian Kuester took over the team in 2009. Kuester started his career as a college coach (and not a particularly good one: his 1989 GWU Colonials put together a 1-27 record, one of the worst seasons in NCAA history). If his .348 winning clip with the Pistons wasn't bad enough, Kuester was often mocked and disrespected by his veteran-laden team. When he was ejected from a regular season game in 2011, Tracy McGrady and Ben Wallace could be seen laughing at him as he was escorted off the court. The embattled coach was given the boot after Detroit finished the season 30-52.