Sunderland have distanced themselves from McClean's decision and have again given their full support to the appeal.
A club spokesman said: "As a club Sunderland AFC wholeheartedly supports the Remembrance Commemorations. It was James' personal choice not to wear a shirt on this occasion."
The England Under 21 international wrote: "Support for the troops past and present before game today is great! We should be proud of our troops!"