If you are a long-time viewer of the site, you are probably familiar with the term, “quality performance”. If not, we made a blog post about it and the associated decay way back in 2008. Simply put, a fighter registers a quality performance when they fight another fighter reasonably close to or above their own rating and they deliver an outcome that is not egregiously beneath what is expected based on the ratings difference. So, it is important to know that quality performances are relative.
In other words, Fedor Emelianenko in his prime would not have registered a quality performance over #500 ranked Joe Schmoe, regardless of the outcome. However, if Joe Schmoe managed a split decision loss against Fedor, Joe would earn the quality performance — so these CAN be earned even in losses.
When looking at fighters with at least 15 wins that have had winning records, one fighter stands way above the rest.
[#4 SW] 
