Is this pattern strange in Wandi's career?

Is this pattern strange.. why is Silva so inconsistent throughout his career in your opinion?

- Wanderlei Silva def. Brian Stann via KO.
Brian...

Source: http://www.mmaforum.com/ufc/131441-pattern-strange-wandis-career.html

Jon Olav Einemo Per Eklund Jason Ellis Aleksander Emelianenko Fedor Emelianenko