Last week, ESPN aired a hilarious commercial featuring Metallica that played off the band's providing of Mariano Rivera his entrance music, "Enter Sandman." And now, there are bloopers.

If you thought Metallica's 'This Is SportsCenter' ESPN spot was funny, wait until you see the blooper reel.

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As the 2010s come to an end, Awful Announcing looks back at some of the decade's most memorable on-air bloopers in sports broadcasting.