"We are very sad to share that Cavaliers guard Kyle Korver's brother, Kirk, passed away today," the team's statement read. "Kyle has been excused from the team to be with his family. We extend our deepest condolences and heartfelt best to Kyle and his entire family as they go through this very difficult time."
Joe Vardon of Cleveland.com noted Kirk Korver was just 27 years old and "became seriously ill last week."
The Cavaliers will be without Korver on Wednesday when they host the Toronto Raptors at Quicken Loans Arena.