Chavez is the WBC “Silver” champion, while Sebastian Zbik is the regular champion, and Sergio Martinez is the champion emeritus.
As for Lyell, he’s a good fighter and capable of giving Chavez Jr. a lot of problems. However, Lyell is small and doesn’t have much power to speak of, hence this is why he was chosen for Chavez. Lyell fights well against weak punchers but struggles badly whenever he’s put in with sluggers. Chavez should dominate Lyell because he won’t have to worry about getting hurt from any return fire the way that he would if Chavez’s management were willing to put him in with a good middleweight from his own division instead of the junior middleweight division. I suppose this is a step up from Chavez’s last scheduled Alfonzo Gomez, a welterweight.