What was once Anderson Silva's proving ground is now the place where Chris Weidman rules.
Weidman bested Silva not once, but twice, and has also defeated Vitor Belfort and Lyoto Machida. He'll get another stiff challenge when former Strikeforce champion Luke Rockhold challenges him for the belt.
Belfort and Silva remain at 185 pounds, but Ronaldo "Jacare" Souza and Yoel Romero have passed them in the pecking order.
Gegard Mousasi, Tim Kennedy, Michael Bisping and Thales Leites all have incredible resumes, while Dan Henderson is still seeking his shot at UFC gold.
Derek Brunson, Robert Whittaker and Roan Carnerio round out the Top-15.
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What makes a division tough is not just the champion, but those that are battling under them to become a challenger and possible titleholder.
In the following slideshow, check out the UFC divisions ranked in order from No. 1 to No. 10, including a look at the top fighters in each one. Feel free to share your thoughts on Twitter, as well.
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