Dan is the son of Hammers legend Steve Potts and plays at fullback like his Dad.
The Daily Mail says comedian Brand made a point of congratulating Potts Jr after the game.
"Is this young Daniel in technicolour?" asked Brand. "Look at you, you're a chip off the old block. Well played, you were brilliant today - I thought you should have got man of the match. Did your dad make it here? Well done, you were brilliant."
Potts's reaction was a shy "Thank you" followed by "That's Russell Brand!" when the scene had moved on.