Miguel Cabrera
Yes. The Triple Crown races are for three year olds only.
The best racer that ever lived, Secretariate.
None. Fillies usually do not run quite as fast as colts, although there have been filly winners in some of the Triple Crown races, but none have ever won the crown.
Secretariat won the triple crown in 1973. He was the 9th horse to do so in 25 years.
Yes here are fillies who'd won TC Races, and the dates Regret won the KY. Derby in 1915 Genuine Risk won the KY. Derby in 1980 Winning Colors won the KY. Derby in 1988 Flocarline won the Preakness in 1903 Whimsical won the Preakness in 1906 Rhine Maiden won the Preakness in 1915 Nellie Morse won the Preakness in 1924 Ruthless won the Belmont in 1867 Tanya won the Belmont in 1905 Rags To Riches won the Belmont in 2007
No horse has ever won the Triple Crown twice because they can only race in the Triple Crown races as three year olds.
Super Saver won the Kentucky Derby Lookin' At Lucky won the Preakness Drosselmeyer won the Belmont.
Clayton Kershaw won the National League triple crown in 2011.
No. Derek Lee has never won the Triple Crown.
Citation won the Triple Crown in 1948
Seattle Slew won the Triple Crown in 1977.
Horses are never favored to win the triple crown. The triple crown is NOT a race - but the total of three races. They are the Kentucky Derby, the Preakness and the Belmont Stakes. The colt I'll Have Another won the first two legs of the TC (Derby and Preakness) but was scratched from the Belmont the day before the race due to a bowed tendon. He has been retired from racing but is in excellent health.