When he was not umpiring, Sheridan worked as an undertaker. A 1905 newspaper article even described Sheridan as having announced his retirement to pursue undertaking in 1905. Before the 1906 season, Sheridan renewed his contract with the American League. In 1906, Sheridan ejected outfielder Tip O'Neill after an argument and may have been indirectly responsible for the end of O'Neill's career. The outfielder was replaced by Pat Dougherty, who won the position for the season. O'Neill did not play in the major leagues after that year.