LAS VEGAS – Claudio Ribeiro  doesn’t think he’s too small for middleweight. Although he weighed in at 181.5 pounds, Ribeiro (10-2) needed just 25 seconds to knock out Ivan Valenzuela on Tuesday at Dana White’s Contender Series 50 to earn a UFC contract. He didn’t appear to rule out a move down to welterweight in the future, but Ribeiro thinks his power translates very well at middleweight. “Basically we’re gonna stay at ’85 and gonna continue to run the course and then maybe later think about what’s below,” Ribeiro told reporters, including MMA Junkie