Casey won the Ojai championships in 1923 by beating Howard Godshall in the final.[2] He won the Oregon state title in 1924 by beating Phil Neer in the final.[3] Casey won the Washington state title in 1924 by beating Leon De Turenne in the final.[4] Casey won the British Columbia title in 1924 by beating A. S. Milne in the final.[5]
Casey won the Pacific Northwest title in 1924 by beating Neil Brown in the final, which was his fourth title in a month.[6] Later that year, he won the California state championships, beating Roland Roberts in the final.[7] In 1925, Casey and John Hennessey reached the finals of the Wimbledon doubles. They lost in five sets to Jean Borotra and René Lacoste.[8] Casey lost in the last 16 of the singles to Lacoste.[9]
Casey lost in the final of the Southern Californian tennis championships in 1927 to Jerry Stratford.[10]