Duke Coaching Legend Mike Krzyzewski personally hand-signed this Nike Elite basketball. Coach K has led his Duke Blue Devil teams to 5 National Titles led Team USA to 2 Gold Medals & is a member of both the College & Pro Basketball Halls of Fame. Celebrate the winningest coach in college basketball history with this Steiner Exclusive autographed collectible. This Krzyzewski autograph is guaranteed authentic and includes a Steiner Sports Certificate of Authenticity and an accompanying tamper-evident Steiner Hologram. The Steiner Seal Means Its Real.