Isaiah Thomas

Celtics introduce Horford, their biggest free agent ever

Al Horford is the biggest free agent ever to sign with the Boston Celtics.

And he's going to try to make sure he's not the last.

"People around the league, they appreciate, they understand how special it is," Horford said Friday at a news conference surrounded by championship banners at the Celtics' practice facility. "I hope that if I'm coming here, it will definitely open the door to other free agents."

Horford agreed to a four-year, $113 million deal with the Celtics last week on the opening day of NBA free agency. A few hours later, he learned that Kevin Durant had spurned Boston's offer and decided to sign with the Golden State Warriors...