The UFC debut for Holly Holm, one of the top bantamweight prospects in women's MMA, won't happen next month.



According to MMA Fighting's Ariel Helwani, sources have confirmed Holm will be out for her UFC 181 clash against Raquel Pennington on Dec. 6 at the Mandalay Bay Events Center in Las Vegas, Nev.



MMAbyneko.com was the first to report Holm (7-0) will miss her fight with an undisclosed injury.



Johny Hendricks will defend his welterweight title against Robbie Lawler in the main event of UFC 181.



