Alexander Volkov out of UFC St. Petersburg main event, Aleksei Oleinik steps in to fight Alistair Overeem
mmafighting.com
Aleksei Oleinik is getting an unexpected second straight main event opportunity.
Aleksei Oleinik is getting an unexpected second straight main event opportunity.
Sergio Pettis had a great deal of success in the UFC’s flyweight division, winning five fights and developing into a top-5 contender before his 25th birthday.