Earlier today it emerged that Sam Stout had pulled out of his UFC 137 bout on October 29th with Dennis Siver for undisclosed reasons.

While it’s not official The general assumption is that Stout’s call off may be related to the passing of his brother-in-law and coach Shawn Tompkins recently.

The good news is that the UFC have moved swiftly to find a replacement, with Donald Cerrone now stepping in to fight Siver.

This is a big fight for both men with currently four fights unbeaten in the UFC, while Cerrone has made an impressive start to his time in the promotion, racking up three wins in a row, extending his own unbeaten run to five fights.

With Jim Miller being the latest lightweight No.1 contender to lose before having the chance to fight for the belt both Cerrone and Siver could place themselves in the title picture alongside the likes of Ben Henderson and Clay Guida with a win in Las Vegas.

UFC 137 is shaping up to be one of the best cards of the year with a blockbuster headline bout between GSP and Nick Diaz being backed up by an equally intriguing clash of top 170lb contenders in BJ Penn and Donald Cerrone.