Yahoo.com is reporting that Brock Lesnar has postponed his UFC fight against Shane Carwin yet again, and this time it’s being reported that he has been diagnosed with mononucleosis. On whether or not Shane Carwin will fight in the meantime, UFC President Dana White said "we’re still trying to figure it out and I’m really not sure where any of it stands right now." White noted that Lesnar will not be able to begin training for the fight until December.