Horford also challenged teammate Jeff Teague, who has yet to post that he has accepted. Millsap challenged teammate Shelvin Mack.

Among other Hawks who have accepted the Ice Bucket Challenge: CEO Steve Koonin, Global Ambassador Dikembe Mutombo, mascot Harry The Hawk, point guard Dennis Schröder and forward Adreian Payne.

The ALS Association has received more than $15 million in donations this year as of Monday, according to reports.

Story by Jaryd Wilson