An error from the United States international handed the home side a 1-0 win over the Premier League side, but the club's boss vowed not to publicly blame him.
Aston Villa manager Remi Garde refused to criticise goalkeeper Brad Guzan for the mistake at Swansea City that saw his side slump to a sixth consecutive defeat on Saturday.
The American unsuccessfully tried to claim Gylfi Sigurdsson's free kick eight minutes after the break, allowing Federico Fernandez to bundle home the only goal of the game and leave Villa cut adrift at the bottom of the Premier League.