did he also have a career in sports?
Yes, he  played football as a goalkeeper for Portsmouth Association Football Club, also he was a keen cricketer, and between 1899 and 1907 he played 10 first-class matches for the Marylebone Cricket Club
Arthur Conan Doyle
While living in Southsea, the seaside resort of Portsmouth, Doyle played football as a goalkeeper for Portsmouth Association Football Club, an amateur side, under the pseudonym A. C. Smith.

Doyle was a keen cricketer, and between 1899 and 1907 he played 10 first-class matches for the Marylebone Cricket Club (MCC)
there are fairies at the bottom of my garden UNANSWERABLE what is "cottingley fairies"? The Cottingley Fairies appear in a series of five photographs who was the photographer? Elsie Wright and Frances Griffiths what do these photographs depict? The pictures came to the attention of writer Sir Arthur Conan Doyle, who used them to illustrate an article on fairies he had been commissioned to write for the Christmas 1920 edition of "The Strand Magazine". Doyle, as a spiritualist, was enthusiastic about the photographs, and interpreted them as clear and visible evidence of psychic phenomena when were they published? December 1920 what is the meaning of the phenomena you mentioned above? UNANSWERABLE who is the writer mentioned above? Sir Arthur Ignatius Conan Doyle was a British writer and medical doctor
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Arthur Conan Doyle [SEP] Sporting career
G. Grace. Doyle was an amateur boxer. In 1909, he was invited to referee the James Jeffries–Jack Johnson heavyweight championship fight in Reno, Nevada. Doyle wrote, "I was much inclined to accept...though my friends pictured me as winding up with a revolver at one ear and a razor at the other. However, the distance and my engagements presented a final bar."