Video shows the analyst, Shaka Hislop, fall over before the Real Madrid versus AC Milan game on Sunday night.
His colleague screamed for help before the broadcast cut away.
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Hislop is OK.
His colleague said after the incident that Hislop was conscious, talking and a little embarrassed.
It's not clear what caused him to faint, but it was hot Sunday afternoon in Pasadena, with temperatures reaching the mid-80s.