Duke's success this season makes you wonder why the 74-year-old is so eager to call it quits.
GREENVILLE, SC – MARCH 19: Head coach Mike Krzyzewski of the Duke Blue Devils reacts in the first half against the South Carolina Gamecocks during the second round of the 2017 NCAA Men’s Basketball Tournament at Bon Secours Wellness Arena on March 19, 2017 in Greenville, South Carolina. (Photo by Gregory Shamus/Getty Images)