Following the retirement of Phil Jackson , formerly the only eight-figure earner among coaches in the four major sports, Doc Rivers  has become the highest paid coach in the NBA, according to Forbes Magazine .
After making $5.5 million this past season, Rivers will now make an average of $7 million over the next five seasons after signing a $35 million extension. He surpassed Spurs coach Gregg Popovich  and Knicks coach Mike D’Antoni, who both make $6 million per season.
Interestingly, the magazine credits the jumps by Rick Pitino  from the University of Kentucky to the Celtics  and John Calipari  from UMass to the Nets  “as the catalysts driving NBA coaching salaries to a new level.”
Meanwhile, the Celtics may have to hire a new assistant coach, as Lawrence Frank  is a candidate for the opening head coaching positions for the Warriors  and Rockets, although Mavericks assistant Dwane Casey appears to be the favorite in Houston, according to CBS Sports.
As a side note, Forbes determined Patriots head coach Bill Belichick ‘s annual estimated salary of $7.5 million is the highest paycheck for any coach in the four major sports.