Al Horford announced to the world on Twitter he was going to the Boston Celtics.
A person with knowledge of the agreement told USA TODAY Sports the contract will be four years for $113 million.
The person spoke on the condition of anonymity because the contract can’t officially be signed until the NBA’s moratorium periods lifts on July 7.
Horford averaged 15.2 points, 7.3 rebounds 3.2 assists and 1.5 blocks per game last season for Atlanta and he was a pivotal part of a Hawks defense that ranked second overall during the regular season (98.8 points allowed per 100 possessions).
By one measure — the Player Impact Estimate that comes courtesy of NBA.com/stats — he was even more valuable than the Golden State Warriors’ do-everything forward, Draymond Green (13.7 to 13.6).
By another — win shares, courtesy of Basketball-Reference.com — he was the 17th most impactful player in the league last season (9.4, just behind the Celtics’ Isaiah Thomas and ahead of the Indiana Pacers’ Paul George).
Even without Horford, the Celtics managed to…