LAS VEGAS, NV - JULY 9: Miesha Tate during introduction against Amanda Nunes during the UFC 200 event at T-Mobile Arena on July 9, 2016 in Las Vegas, Nevada. (Photo by Rey Del Rio/Getty Images)

Former bantamweight champion Miesha Tate made a stunning announcement after loss to underdog challenger Raquel Pennington

Stunning.

Former UFC bantamweight champion Miesha Tate (18-7) announced her retirement following a demoralizing unanimous decision loss to Raquel Pennington (9-5) in her first fight since dropping the title to Amanda Nunes.

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Pennington worked the jab, held her own on the ground and absolutely dominated Tate throughout the fight to earn the win.

It was a frustrating night for Tate, who coached Pennington on "The Ultimate Fighter." She mentioned after the loss that her decision to retire was a result of the loss.

Tate dropped her two title fight contests against Ronda Rousey and was aiming for a third after beating Holly Holm for the belt. That simply wouldn't be, as she was submitted by Nunes back in July while Rousey took a sabbatical.