Warrington-born Keenan made his debut for Blackpool on 25 January 1913, in a 4–2 defeat at
Fulham. It was his only appearance of the
1912–13 season. He also made one league appearance the following season,
1913–14, in a goalless draw against
Notts County at
Bloomfield Road on 13 April 1914, fifteen months after his first start for the club. Keenan didn't make any appearances in
1914–15; however, in
1917–18, the third season of regional football during
World War I, Keenan was ever-present in Blackpool's 36 games in the principal and subsidiary competitions. He also scored three goals. The following season,
1918–19, the final season of inter-war football,
Bill Norman was installed as Blackpool's first full-time manager. He selected Keenan in 33 of the club's 37 games.
Football League programmes returned for
1919–20, and Keenan made 35 starts in Blackpool's 42 league games. He also helped steer the club to the third round of the
FA Cup, at which point they were knocked out by
arch-rivals Preston North End. In
1920–21, Keenan was again ever-present. He also scored his first League goals for the club. The first came in the opening game of the season, a 2–2 draw at
Bury on 28 August. The second was in a 2–0 victory at
Rotherham County on 12 February. His third was the only goal of the game at
Port Vale on 26 February. Keenan's appearances were limited in
1921–22, with just fifteen league starts. In
1922–23, Keenan's final season with Blackpool, he appeared in just the first seven league games, the final one being a 2–1 defeat at home to
Southampton on 23 September, in front of a crowd of 13,500. ==Notes==