Atfer coming from 2-1 down against ten men, the win was sealed with Daniel Nardiello's last minute strike, as the forward celebrated a brace of goals on the afternoon.
His gaffer told themillers.co.uk earlier: "Everyone at Rotherham United is pulling that rope in the same direction, there is incredible unity and I am proud of that, what I do know for a fact is that not every dressing room has it, we do!
"It made no difference whether Oldham had 11 or 10 men, we dominated when they had both and played on the counter attack but I was impressed with them and the way they did it. There is no doubt they have a number of talented players and they, like my lads, gave everything they had. The match was a great spectacle to watch but no one could dispute we did not deserve to win after we laid siege to the visitors’ goal for the last 30 minutes.