With the 2019-20 NBA season just about two months away, there is no shortage of players who are looking to make their mark in the league. From the incoming class of rookies to the star players now on championship-contending teams, they're all looking to prove something to everyone. Then there are these 11 players. From former all-stars looking to rebound after a rough season to sophomores looking to wash away the stink of a mediocre rookie season, these are the players that have more to prove than anyone else in the league. Now, I did want to give two honorable mentions to Bol Bol and Cam Reddish for this list. Bol was projected to be a lottery that slid all the way to the middle of the second round. He'll be looking to prove to everyone that he is still the lottery-level talent he was projected to be, but based on his draft position, I'm not sure if he'll be on the roster or in the G-League for most of the season. Reddish, on the other hand, had an underwhelming seaso...