People make mistakes, and basketball players are just that, people. Therefore, basketball players make mistakes just like everyone else. Whether those mistakes are things like missing wide-open lay-ups or...pretty much half of what JaVale McGee has done in his career, mistakes are still bound to happen. Even Michael Jordan has messed up on the court before . The mistakes on this list, however, are so much more than that. Not only were these mistakes, mental errors, or avoidable gaffs, but they were mistakes that would end up altering the very game they happened in. Whether they be in the NBA or in college, these are 9 critical mistakes that altered the outcomes of basketball games. JR Smith Forgets the Score Obviously, we had to start with a major mental error that occurred this past season, and one that hurts me deeply to think about as a Cleveland Cavaliers fan. In Game 1 of the 2018 finals, the Cavaliers were trailing by one against the Golden State Warriors when Ge...