Manager and part-owner Connie Mack totally dismantled his 1914 AL-champion club after it was swept by the "Miracle" Boston Braves in the World Series.

At 21, Sheehan won four games and lost nine in 1915, but the following season he dropped 16 of 17 decisions (.059), although he compiled a decent earned run average of 3.69.

Sheehan coached for the Reds (1935–37), Brooklyn Dodgers (1938) and Boston Braves (1944), and spent many years as a minor league manager and scout for the New York/San Francisco Giants.

Willie Mays thought the problem was that Sheehan was merely a fill-in while owner Horace Stoneham tried to pick a permanent replacement for Rigney.

"[2] Sheehan resumed his scouting duties at season's end as the Giants hired former player Alvin Dark to manage.