Dallas Mavericks coach Don Nelson argues a call in the first quarter against the Milwaukee Bucks Tuesday, Dec. 30, 1997, in Milwaukee. (AP Photo/Morry Gash Stock Photo - Alamy

FILE -- This is a March 1, 2003 file photo showing Dallas Mavericks head coach Don Nelson, left, listening as Mavericks owner Mark Cuban talks prior to the start of an NBA

Dallas Mavericks coach Don Nelson argues a call in the first quarter against the Milwaukee Bucks Tuesday, Dec. 30, 1997, in Milwaukee. (AP Photo/Morry Gash Stock Photo - Alamy

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FILE -- This is a March 1, 2003 file photo showing Dallas Mavericks head coach Don Nelson, left, listening as Mavericks owner Mark Cuban talks prior to the start of an NBA

FILE -- This is a March 1, 2003 file photo showing Dallas Mavericks head coach Don Nelson, left, listening as Mavericks owner Mark Cuban talks prior to the start of an NBA

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Dallas Mavericks coach Don Nelson argues a call in the first quarter against the Milwaukee Bucks Tuesday, Dec. 30, 1997, in Milwaukee. (AP Photo/Morry Gash Stock Photo - Alamy

Milwaukee Bucks coach Don Nelson raises his hands May 17, 1987 as he reacts at the end of fourth quarter actgion as the Boston Celtics eliminated the Milwaukee Bucks from NBA Playoff

Dallas Mavericks coach Don Nelson argues a call in the first quarter against the Milwaukee Bucks Tuesday, Dec. 30, 1997, in Milwaukee. (AP Photo/Morry Gash Stock Photo - Alamy

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FILE -- This is a March 1, 2003 file photo showing Dallas Mavericks head coach Don Nelson, left, listening as Mavericks owner Mark Cuban talks prior to the start of an NBA game against the Memphis Grizzlies in Dallas. Mark Cuban and Don Nelson have

FILE -- This is a March 1, 2003 file photo showing Dallas Mavericks head coach Don Nelson, left, listening as Mavericks owner Mark Cuban talks prior to the start of an NBA

FILE -- This is a March 1, 2003 file photo showing Dallas Mavericks head coach Don Nelson, left, listening as Mavericks owner Mark Cuban talks prior to the start of an NBA

Dallas Mavericks coach Don Nelson argues a call in the first quarter against the Milwaukee Bucks Tuesday, Dec. 30, 1997, in Milwaukee. (AP Photo/Morry Gash Stock Photo - Alamy