Al Horford left the Atlanta Hawks last offseason to sign a four-year $113 million deal with the Boston Celtics. 

"You know Al Horford, they got really close with money," said Wojnarowski. "I can't ever remember a player and a team walking away from each other over less total dollars than Atlanta and Horford. It was only a few million dollars over what would have been a five-year deal."

The Hawks could have offered a five-year, $153 million max deal, but their best offer was a five-year, $136 million deal.

Horford decided to take less guaranteed money after the Hawks were unable to split the difference while having a new opportunity with the Celtics.