From 1913 until 1915, Mack served as player-manager of the Raleigh team in the Class D North Carolina State League.

Mack then became player-manager of the Hanover (Pennsylvania) Raiders of the Blue Ridge League, another Class D circuit.

It was widely expected that when his father retired, Earle would manage the team while his brother Roy and younger half-brother Connie Jr. would run the front office.

Roy and Earle considered Connie Jr., 20 years their junior, to be a mere child, and dismissed their half-brother's ideas to improve the team.

[1] Earle had long hoped to succeed his father as permanent manager of the Athletics, even though the players questioned his baseball acumen.

In spite of this, in August, Earle and Roy were able to buy out Connie Jr. and the Shibes and take effective control of the franchise.

Earle Mack died at age 77 in Upper Darby Township, Pennsylvania and is buried in Forest Hill Cemetery, Morganton, Burke County, NC.