Per reports at the time, in the summer of 2016 Josh Richardson suffered a partial MCL tear during an summer workout before his second season with the Miami Heat.
“Josh Richardson may miss the start of the season for the Miami Heat, after the second-year shooting guard partially tore the medial collateral ligament in his right knee during an offseason workout Friday.”
In the loss to the Orlando Magic Richardson went to the basket for a dunk but seemingly couldn’t get the necessary lift to finish it off.