UFC on FOX 7: Nate Diaz moving back up to welterweight division after Josh Thomson fight

Having competed 13 times in the Ultimate Fighting Championship (UFC) lightweight division, Nate Diaz is -- once again -- going back up to the land of the welterweights.

During yesterday's (April 18, 2013) media scrum, Diaz announced that his UFC on FOX 7 155-pound scrap against Strikeforce import Josh Thomson could very well be his last in the division, because he's already fought everyone at lightweight.

Or at least fought everybody worth fighting.

His words (via MMA Fighting):

"I'm not huntin' (the title) right now, honestly. My boy is about to put it down and hold the belt for the next ... I don't even know how long. I'm probably gonna bail up outta this weight division as soon as this fight is done. I fought everybody at lightweight already."

According to Nate, his training partner Gilbert Melendez is going to "handle" current lightweight champ Ben Henderson in this weekend's main event in San Jose, California, so a fight against fellow "Scrap Pack" member is out of the question.

So is fighting the same competition all over again.

Nate's first trip to 170 pounds produced tepid results, going an even 2-2, defeating Rory Markham and Marcus Davis in consecutive bouts before losing two straight against Dong Hyun Kim and Rory MacDonald.

Nothing to hang your head over.

But, the fact remains, the lightweights just aren't that interesting to the former No. 1 contender anymore. And with his lone loss in the division over the last two years coming to the aforementioned Henderson at UFC on FOX 5 back in December, it's time for new blood and new challenges at 170 pounds.

Plus, he can fill the spot in the division older brother Nick Diaz vacated a few weeks ago. Anyone think Nate's second go round at welterweight will be better than his first?