None more so than by Jack Rodwell, who blew at least three chances within five minutes of arriving as a 64th-minute sub.
West Ham hit Sunderland’s bar twice, the first in the 19th minute through Mark Noble and then late on by sub Andy Carroll.
Sunderland kept fluffing their lines, especially Patrick van Aanholt.
He fluffed an easy clearance and clumsily gave the ball away to West Ham winger Michail Antonio, who cut in from the right and curled a 30th-minute shot around Vito Mannone to put the Hammers ahead.
His goal sparked a Homer Simpson-inspired celebration when he hit the deck and spun around in a circle with his legs, something he said he practised just the night before.
Rodwell’s chances came and went before Hammers sub Carroll rattled Sunderland’s bar again in the 74th minute.