Former UFC middleweight contender Nate Marquardt's next fight will be as a welterweight.

The UFC announced Wednesday that Marquardt and Anthony Johnson have verbally agreed to meet at UFC on Versus 4 on June 26 at Consol Energy Center in Pittsburgh.

The bout will headline the event.

Marquardt (31-10) makes the move down in weight despite posting a decision win over Dan Miller in his most recent right in March. His entire UFC career, dating back to 2005, has been contested at 185 pounds. He fought for the middleweight title once, dropping a first-round TKO loss to Anderson Silva in 2007.

The 31-year-old is 2-2 since the start of 2010. Both losses came with a title shot on the line.

Johnson (9-3) is coming off a unanimous decision win over Dan Hardy in the co-main event of last month's UFC Fight Night 24 card in Seattle.

It was his first test since returning from a knee injury that kept him sidelined for all of 2010.

Brett Okamoto covers mixed martial arts for ESPN.com.