The Welshman scored with just eight minutes to play to pile further misery on Jose Mourinho's side
A rare error from Manchester United goalkeeper David de Gea allowed Stoke City to snatch a 1-1 draw at Old Trafford in the Premier League on Sunday.
Wales international midfielder Joe Allen, who was earlier on the receiving end of a dreadful high tackle from Ander Herrera, was the beneficiary from De Gea's blunder eight minutes from time.
Stoke edge up to second bottom ahead of Sunderland with their share of the spoils, for which they are largely indebted to their own keeper Lee Grant.