A horse or human athlete who participates in steeplechase racing(noun)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "steeplechaser" in a sentence
"Lord Danesbury read Atlee's letter with an enjoyment not unlike the feeling an old sportsman experiences in discovering that his cover hack -- an animal not worth twenty pounds -- was a capital fencer; that a beast only destined to the commonest of uses should actually have qualities that recalled the steeplechaser -- that the scrubby little creature with the thin neck and the shabby quarters should have a turn of speed and a 'big jump' in him, was something scarcely credible, and highly interesting."
"The marquee piece: a three-foot tall late 19th century bronze of a steeplechaser by Isidore-Jules Bonheur."
"Raised in a village in Pembrokeshire in southwest Wales, Mr. Francis was the son of a horse-dealer, steeplechaser and farmer."