Albert F Pfyl was refered to as "Phyle" in the newspapers in St. Louis, but elsewhere he appeared in box scores under the name Pfyl. In his second start for the Terriers, he allowed 5 runs and 11 hits in nine innings of a 14-5 win. "Pfyl Pitches Good Ball. Tall Young Right Hander Holds Locals in Check All the Way" read the headline in the Chicago Inter Ocean after that start against Chicago on May 31. (Pfyl was 6' 1" according to the Fort Wayne Sentinel, March 25, 1912.) While he had that early success, he appeared in only six games over about one month with the club.

Prior to joining the Federals, Pfyl had some minor league experience. He pitched for Keokuk, Iowa, in the Central Association (under the name A. F. Pfyl) in 1911 at the age of 20. He appeared in eight games for Keokuk, with a 4-3 record. The following spring he auditioned for the club in South Bend, but failed to make the club (Fort Wayne Sentinel, March 25, 1912). In the spring of 1913, he pitched for Hastings in the Nebraska State League in exhibition games, but he was released in mid-May, right before the start of the season. "Manager Shaner announced last night the release of 'Slim' Pfyl, the pitcher from St. Louis. Lack of experience was the reason assigned for letting go of this twirler who had a good assortment of benders and a fair amount of smoke" (Hastings Daily Republican, May 15, 1913). After his release from Hastings, he returned to St. Louis, where he joined the Federals a few weeks later.

Pfyl was born in Missouri on April 4, 1891, a younger brother of was the brother of Monty Pfyl (St. Louis Globe-Democrat, June 20, 1914). Their parents were both from Switzerland. He was 22 when he pitched for the St. Louis Federals in 1913, his final stint in professional baseball. In 1914, he played with a local club in St. Louis, the Manewals. By 1916 he was married to Cecelia Wolf; they had a son, Albert Jr., born that year. Albert Sr. died in 1964, and Cecelia died in 1966. They are both burried in Calvary Cemetery and Mausoleum in St. Louis.