That was clearly his attempt to pass the buck without looking like he was throwing his fellow official under the bus. He was in a tough spot in that post game interview. He knew the entire sports world was listening to his explanation of the worst call in professional sports.
I can promise you that by the time of that interview he had seen the same replay that we all saw on network television and knew how bad the decision was. He was in full blown damage control at the time. I bet he wishes that interference calls could have been challenged at that time. He would have loved to have the booth make that call rather than go through all the ridicule he has endured ever since.