Utah (13-9-3) was left severely short-handed against Angel City after defender Paige Cronin and midfielder Ana Tejada were ejected by the 24th minute.
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Two minutes later, Ally Sentnor converted the resulting penalty kick past goalkeeper Mandy McGlynn to put Angel City (11-8-6) ahead in Sandy, Utah.
Just two minutes after coming off the bench for the second half, Taylor Suarez made it 2-0 with a one-touch finish off a pass from Gisele Thompson.
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Sveindís Jónsdóttir capped the scoring in the 67th minute, dispossessing Tatumn Milazzo deep in Utah territory before rolling a shot past McGlynn’s right side.
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