Celtics Sign Al Horford To Two-Year Extension
Al Horford Addresses Snapping Shooting Slump as Celtics Defeat Sixers
Sixers road woes continue after loss to Bucks – The Morning Call
Celtics' Horford Turns Back the Clock and the Bucks - The New York Times
Al Horford to sign with Sixers on four-year deal
It's not Horford's fault that his time as a 76er has been less than ideal
All about Celtics star Al Horford with stats and contract info – NBC Sports Boston
Are the Sixers Too Big to Succeed? - The Ringer
Sixers sign All-Star big man Al Horford, per report