Conversation so far:
Was Affirmed the favorite in the Kentucky Derby?
Alydar was made the 6-5 favorite for Kentucky Derby, with Affirmed the second choice at 9-5.
Was the 1978 Kentucky Derby with Affirmed a close race?
Affirmed won the Kentucky Derby by 1 1⁄2 lengths.
How much did Affirmed win the Preakness by?
Affirmed held a short lead entering the stretch and held it to defeat Alydar by a neck.
Was the 1978 Belmont with Affirmed a close race as well?
Affirmed rallied in the final stride to win by a nose.
Does the Triple Crown happen often?
The Triple Crown, is a title awarded to a three-year-old Thoroughbred horse who wins the Kentucky Derby, Preakness Stakes, and Belmont Stakes. This can theoretically occur annually.
Who was the last horse to win the Triple Crown before Affirmed?
The winner before Affirmed was Seattle Slew.

Question: Is there anything else noteworthy about Affirmed's Triple Crown?
Self-contained rewrite: Is there anything else noteworthy about Affirmed's Triple Crown?