I think Gallardo and Owings are probably better hitters than Zambrano at this point, though your point is probably correct. This isn't something new for Kendall, last year he had 3 completely miserable months and 3 very tolerable months and they alternated. When he is hot he can still put up a .700+ OPS for a month, when he's not it is groundout to 3B and pop up over and over.