It would appear as if an irregular heartbeat has knocked Dan Hardy from a scheduled fight with Matt Brown next month at UFC on FOX 7.

In Hardy’s place will step Jordan Mein to take on Matt Brown. The original fight was set for the FOX main card, but that remains unclear at this point.

Hardy (25-10) took to Twitter to explain his withdrawal from the bout.

Brown (16-11) has won four straight, while Mein (27-8) had a successful UFC debut earlier this month, stopping Dan Miller.