Is the Detroit Tigers' Big Four really a Big 5?

It's difficult to dispute the Tigers have the best starting pitching rotation in baseball. Justin Verlander is arguably the best starter of his generation. Max Scherzer is an enormous and emerging talent. Doug Fister has been a wonder since the Tigers' traded for him in 2011, developing a tremendous breaking ball and a swing-back fastball, which has become his trademark. Anibal Sanchez,