Until the last few games I was laying the poor play mostly on the coaches but of late it has shifted to a few players. Jakarr Sampson in particular. He has not regressed, he has not progressed to being a smart team player. This is a kid with limited offensive tools from the outside and most of the season he has made bad decisions in his shot selection. Instead of playing closer to the basket, like Sanchez, he tends to roam and once he has the ball tends to force his move. it usually does not end well since he telegraphs the move. Of the entire team he appears to have the lowest BB IQ. That will only change with hard work and experience.
Two other players that get significant playing time to prove their value are Phil Greene and Dom Pointer. Both have hurt the offense more than helped this year and need reduced minutes in favor of a Jamal Branch or Felix (there must be a same reason Lavin activated him)!
As far as in-game performance these guys have let the coaches down. Missed bunnies, mental mistakes and poor on court communication, especially at the end of games, has cost at least two wins with DePaul being the best example to date.