Not too way back, Mark Coleman headlined UFC 109 dealing with Randy Couture.
Several days later, he’s apparently now not good enough to stay within the UFC in any respect.

On Wednesday, following a lopsided loss to Couture the UFC launched 
Coleman from his contract and cut the veteran heavyweight.

Coleman is now free to signal with another promotion, however at 46 years of age his probably-and most advisable-course of action is retirement.

Fighters seldom do the ‘most advisable’ factor, nevertheless,
and his actual plans are unknown at the moment. Coleman turned the primary UFC fighter to be 
lower immediately after headlining a PPV event.
Others have left due to drug check failures or for other opportunities, but none have ever been reduce from their 
contract. Sources near the UFC recommend that it was a choice nobody 
wished to make, but that every one felt was unavoidable as 
a consequence of Coleman’s age and deteriorating expertise.
In fact everyone knew of his age and deteriorating skills for awhile now, so the UFC’s baleful response is a tough act to purchase.