Carlisle manager Graham Kavanagh watched his side suffer the first defeat of his tenure from the stands after a late altercation with the match officials which led to his second-half dismissal from the technical area.
Yet he was quick to acknowledge the contentious first-half penalty decision, which brought the only goal of the game for Adam Rooney was not the only reason behind the disappointing result.
He said: “We were not anywhere near good enough.
“We didn’t pass it as well as we have been and we missed too many of the second balls. I told the lads before kick-off Oldham are a team who work hard for each other and we needed to match that for the full 90 minutes.
“We didn’t quite get that so we do come away feeling disappointed
“Having said that, we created good chances so there were real positives in there as well.”
Kavanagh, when asked about the sending-off, added: “The fourth official was superb right the way through the game.
“The referee had missed things so all I did was ask him about them.
“He told me I had to leave the technical area and I suppose he was trying to be the bigger man by sending me off.
“It’ll be interesting to see what they say in the report because all I did was ask a question.”
The Cumbrians looked comfortable until Chimbonda and O’Hanlon went shoulder to shoulder with Rooney, as he steamed through a gap in the defence, and the referee’s decision to award the spot-kick was accompanied by howls of surprise from the Carlisle dugout.
Striker Lee Miller said: “It didn’t look like there was too much contact but it’s one we would need to see again.
“Mark Gillespie almost got there as well, but I thought we did enough after that to get something from the game.
“It way great for me to be back on the pitch and I honestly thought I’d scored the equaliser with that header late in the game.
“Unfortunately, the goalkeeper got down to it and pushed it away.
“Hopefully, I’ll build up my match fitness from here and I can get a run in the team and kick on.”
Carlisle have an immediate chance to put things right tomorrow night when they make the long trip to MK Dons.
OLDHAM ATHLETIC: Oxley, Grounds, Wesolowski, Kusunga, Tarkowski, Smith, Rooney (Clarke-Harris 90), MacDonald (Millar 15), Dayton, Mills, Philliskirk. Subs (not used): Schmeltz, Montano, Winchester, Rodgers, Rachubka.
Booked: Wesolowski, Kusunga, Tarkowski.
Goal: Rooney (26 pen).
CARLISLE UNITED: Gillespie, McSweeney (Miller 74), O’Hanlon, Chimbonda, Townsend, Thirlwell, Berrett, Noble (Eccleston 46), Amoo, Robson, Beck (Symington 68). Subs (not used): Fleming, Livesey, Potts, Guy.
Referee: Mark Heywood. Attendance: 4,478.