The Tyrone champions were in the comfort zone for the entire second-half and outscored their hosts 2-9 to 0-4.
However, talk after the game centred on the arrest of an Errigal Ciaran supporter at half-time and the dismissal of World handball champion Paul Brady just nine minutes after entering the fray.
Gardaí acted after abuse was directed at the Mullahoran players at half-time while Brady received a straight red after an off-the-ball incident which saw Tyrone’s Stefan Tierney flattened.
MULLAHORAN: E Brady; S Smith, K Brady, J Reilly; D Sheridan (0-1), Patrick Brady, M Brady; C Sheils, PP Galligan; T Nannery, Enda O’Reilly (0-4, all frees), R Lynch; Philip Brady, Eddie O’Reilly (0-2, both frees), F Brady (1-0).
Subs: N Smith for J Reilly (22); P Brady for T Nannery (22); T Nannery for PP Galligan (46); J Donohoe for F Brady (51).
ERRIGAL CIARAN: J Devine: A McCrory, M McRory, C Quinn; M McCann, P Harte (1-0), D Harte (0-2); Cormac McGinley, E McGinley (0-1); Ciaran McGinley, T Canavan (1-2), S Tierney (0-2); D McDermott (1-2, both frees), B Horisk (1-1), R McRory (0-3).
Subs: D Canavan (0-2) for D McDermott (45); S Hackett for Cormac McGinley (50); P Quinn for D Harte (53); N McGarvey for Ciaran McGinley (55).
Referee: P Hughes (Armagh).