Shut Out was a chestnut stallion sired by Hall of Famer Equipoise, the multiple stakes-winning champion his fans called "The Chocolate Soldier."
Hall of Fame conditioner John Gaver, training for Greentree, gave Eddie Arcaro his choice of Kentucky Derby mounts: Devil Diver or Shut Out.
Shut Out's other main rival that year was Alsab, 1941's U.S. Champion Two-Year-Old Colt.
Yet Shut Out came close to winning the 1942 Triple Crown, losing the Preakness Stakes to Alsab while finishing fifth after a troubled trip.
Shut Out died in 1964 after a respectable career at stud, siring a number of stakes winners for Greentree such as One Hitter.