Man O' War is considered, by most, the greatest racehorse of all time.
He was so unique and so dominant that comparisons are often meaningless.
Foaled in 1917 in Lexington, KY, Man O' war quickly grew into an absolute brute. He regularly raced carrying 130+ pounds and made a habit of beating his opponents by more than five lengths.
Man O' War came extremely close to perfection, only losing one race in his 21-race career. It was such a monumental feat when he lost, that our sports term "upset" is derived from the race (the winning horse's name was Upset).
So how does I'll Have Another compare?
I'll Have Another will probably run nowhere close to 21 races in his career and will surely never carry 130 pounds.
Man O' War was much larger (16 hands 2 inches) than the Triple Crown hopeful who only measures a reported 15 hands 3 inches.
Man O' War skipped the Kentucky Derby during his three-year-old campaign, but by the time he entered the Belmont Stakes in 1920, he had raced 12 times.
I'll Have Another enters Saturday having raced only six times.
Most legendary horses can't stack up to Man O' War's dominant race record, his imposing size or his lasting influence. That said, I'll Have Another won't come close to comparison, even with a Triple Crown win.