Rey Mysterio Jr. explains why he left WWEWrestler Rey Mysterio Jr. explains the WWE's schedule took a toll on his body.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceWrestler Rey Mysterio Jr. explains the WWE's schedule took a toll on his body.Add us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished May 16, 2016 | Modified May 16, 2016SI STAFFShare on FacebookShare on XHome/Extra Mustard