[1] Elfrink played sports while attending Coe College in Cedar Rapids, Iowa.
He was a key player on the football team of 1914 under head coach Moray Eby that the college considers to be one of the best teams the school fielded of all time.
[2] Elfrink was the 12th head football coach at Fairmount College—known as now Wichita State University—Wichita, Kansas, serving for one season, in 1920 season, and compiling a record of 3–4–2.
[3] He also served that academic year as head basketball coach, leading his team to a record of 16–2.
This biographical article relating to a college football coach first appointed in the 1920s is a stub.