Home: Franklin Lakes, NJ
Born: February 2, 1962

Mark is the youngest of the three Leone brothers. A graduate of Drew University, he won the AHSA Medal Finals in 1979, and two years later he began riding Grand Prix level jumpers. Mark has been competing on the grand prix circuit since 1981. In 1982 he won the USET's Lionel Guerrand-Hermes award given to a top Young Rider after placing eighth in the FEI World Cup Final on Tim.

On “Crown Royal Artos”, Mark claimed key victories in 1993, including the prestigious $50,000 President's Cup at the Washington International Horse Show, in Landover, MD, and the British Airways World Cup Qualifier at the Royal Agricultural Winter Fair in Toronto, Canada.

During the 1994 Winter Equestrian Festival, Leone and “Crown Royal Artos” placed third in the $50,000 Grandprix of Florida and were second in the prestigious American Invitational.

In 1994, Mark and “Crown Royal Artos” qualified for the World Cup Final in 's-Hertogenbosch, Holland, where they were the highest placed American combination, finishing 10th overall.

In 1995 Mark and “Crown Royal Artos” again qualified for the World Cup Final. In 1997, he had Grandprix wins at the Garden State Horse Show in NJ, the Grandprix of Pittsburgh and at the Royal Agricultural Winter Fair in Toronto.

Leone's 2001 season got off to a great start when he won the $75,000 Ford Idle Dice Classic at the Cosequin Winter Equestrian Festival in Wellington, FL.

In 2002, Leone and “Pinkata DeLongpre” had wins in the $50,000 Budweiser Grand Prix of Lake Placid and the American Jumping Classic in Mason, OH. He also rode “Pinkata” to the win in the $50,000 Rolex/USET Show Jumping Championship at the 2003 Bayer/USET Festival of Champions at the USET Olympic Training Center in Gladstone, NJ. In 2004, he won the Kentucky Summer Grand Prix.

Leone is a consistent competitor on the big league circuit often finishing in the ribbons. In 2010, he used his talents as a selector to help pick the US squad for the Alltech FEI World Equestrian Games, a position he held again in 2012 for the London Olympic Games.