Mark Cuban may be getting a bit rash in some his thought process while actively pursuing an NBA Title. First, he traded Devin Harris — a good, young player who could play defense and offense with energy and sprite — for Jason Kidd, an old guy who hits his wife and isn’t very good anymore.

Now he’s decided it’s best to fire Avery Johnson.

Johnson leaves with an impressive résumé after three-plus seasons, but Mavs owner Mark Cuban couldn’t tolerate a bottom line of being 3-12 in the playoffs since blowing a 2-0 lead in the 2006 NBA Finals.

The Mavericks followed that disappointment by the embarrassment of being ousted by Golden State in the opening round last season in one of the biggest upsets in league history. They were just dumped in five games by Chris Paul and the New Orleans Hornets. Dallas didn’t win a single road game against the Heat, Warriors or Hornets, an 0-9 skid that was too much to overcome.

Something that shouldn’t be overlooked is that 250 games into his career, Avery Johnson has a better coaching record than anyone in the history of the NBA. Maybe Coach Nelson would consider a return. . .