Undefeated Chris Weidman (11-0) is the No. 1 middleweight, but Anderson Silva is not far behind.
Questions? Comments? To reach Jeff Wagenheim or contribute to the SI.com MMA mailbag, click on the E-mail link at the top of the page.
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide—from Peter King, Tom Verducci, Lee Jenkins, Andy Staples, Grant Wahl, and more—delivered straight to you, along with up-to-the-minute news and live scores.