Some unfortunate news for British welterweight Dan Hardy. Originally scheduled to fight Matt Brown on April 20th, Hardy was not given clearance to fight by the California State Athletic Commission due to a heart condition, which he humorously explained on Twitter:

Sorry guys, I couldn't be more disappointed. Turns out I have a wolf heart and the California commission won't clear me to fight... — Dan Hardy (@danhardymma) March 22, 2013

Wolf heart = two heart beats. It's an evolutionary enhancement and the commission see it as an unfair advantage. — Dan Hardy (@danhardymma) March 22, 2013

With Hardy out, the UFC wasted no time in finding a suitable replacement. Fresh off his win over Dan Miller, Jordan Mein now fights Matt Brown at UFC on Fox 7.

Coming off his huge win at #UFC158, our own Jordan @fightingmeins is in for the injured Dan Hardy and will fight Matt Brown at @ufconfox 7 — UFC Canada (@UFC_CA) March 22, 2013

Mein is the 2nd fighter from UFC 158 called into late-notice action. Earlier in the week Darren Elkins stepped up to fight Chad Mendes after Clay Guida withdrew from the card.

The 23-year-old Canadian became the first man to finish Dan Miller. Matt Brown, who has won his last 4, has never been knocked out, so it would be some feat for Mein if he could pull off consecutive "first time" TKO victories.

This unexpected change means that the entire UFC on Fox 7 main card is "UFC vs. Strikeforce": Ben Henderson vs. Gilbert Melendez, Frank Mir vs. Daniel Cormier, Nate Diaz vs. Josh Thomson, and now Jordan Mein vs. Matt Brown.