Act 1: Derek Fisher signs with the Dallas Mavericks after the 2012-2013 season begins, playing nine games before injuring his right knee. Act 2: The Dallas Mavericks grant Fisher his request to be released from the team so he can nurse his injury and spend time with his family. Act 3: The Oklahoma City Thunder sign Derek Fisher to be their backup point guard for the rest of the season. Mark Cuban is pissed.