Tyrone Spong has withdrawn from World Series of Fighting 3, leaving the promotion to announce a new co-main event.
Cezar Ferreira has withdrawn from his scheduled UFC on FX 8 clash with Chris Camozzi due to injury.
For the second time in 2013, injuries have forced Manny Gamburyan to withdraw from an event.
A knee injury has forced Forrest Griffin to withdraw from his planned meeting with Phil Davis at UFC 155, promotion president Dana White announced on Wednesday.
A heavyweight clash between Lavar Johnson and Brendan Schaub has been removed from the UFC on Fox 5 bill.
Anthony Perosh has reportedly suffered a broken toe and will be unable to compete against Joey Beltran at UFC on FX 6.
Sara McMann has suffered an undisclosed injury that will prevent her from making her Strikeforce debut against Liz Carmouche on Nov. 3.
Geronimo dos Santos will have to wait a little longer to make his UFC debut.
For the second time in a month, a Zuffa-affiliated mixed martial arts card has been canceled.
UFC heavyweight Frank Mir has suffered a knee injury and will be unable to compete against Daniel Cormier.