One of MMA's iron men has been forced to the sidelines with an injury.
Josh Koscheck, the veteran welterweight who is always among the first to volunteer for available card slots, is out of his scheduled UFC 151 co-main event matchup with Jake Ellenberger due to a bulging disc in his back.
The news was first reported on Tuesday's edition of UFC Tonight.
His only other extended time off came after challenging Georges St-Pierre for the welterweight title, caused by a broken orbital bone sustained during the unanimous decision loss.
Koscheck is 17-6 overall.
According to UFC Tonight, as of yet there is no replacement for Ellenberger (27-6), who was hoping to rebound from his first loss in his last seven fights.