Aaron Simpson vs Jon Fitch booked for UFC on FUEL TV 4 on July 11 in San Jose

It's on.

Former Ultimate Fighting Championship (UFC) Middleweight Aaron Simpson (11-3) finally has a date for his welterweight debut, which comes against former division number one contender Jon Fitch on the main card of UFC on FUEL TV 4, scheduled for July 11, 2012 at the HP Pavilion in San Jose, California.

"A-Train" tweeted the booking on Monday.

Simpson has spent his entire career as a 185-pounder, rattling off eight straight wins before consecutive losses to Chris Leben and Mark Munoz in 2010 sent him tumbling down the divisional ladder. A fresh start at a lighter weight could prove to be the turning point in his mixed martial arts (MMA) career.

For better or for worse.

Former welterweight number one contender, Jon Fitch (23-4), is coming off a crushing knockout loss to Johny Hendricks at UFC 141 last December. It was the second straight performance that failed to net him a win, as the former Purdue University wrestler went to a draw opposite B.J. Penn at UFC 127 last year in Australia.

It was, however, just his second loss inside the Octagon, the first coming at the hands of reigning welterweight champion Georges St. Pierre way back in August of 2008.

Would a win over Simpson put him back "in the mix?"

UFC on FUEL TV 4 will feature a middleweight main event of Mark Munoz vs. Chris Weidman with the number one division contender position in the 185-pound division on the line.

A Light Heavyweight bout that pits Brandon Vera vs. James Te Huna is also expected to take place in the "Shark Tank" on fight night, as well as a potential lightweight war between Anthony Njokuani vs. Paul Taylor.

To check out the latest UFC on FUEL TV 4 fight card and rumors click here. And to check out our comprehensive UFC on FUEL TV 4 event archive click here.