5. Jimmy Butler
Jimmy Butler put on one of the most memorable performances in NBA history recently and it was in a practice.
In the now infamous team scrimmage this offseason, a disgruntled Butler reportedly played with the end of the bench guys for the Timberwolves and beat the starters, including Karl-Anthony Towns and Andrew Wiggins.
Butler was able to dominant that scrimmage because of his defense, as he is one of the best defenders and fiercest competitors in the NBA.