I feel Madrigal will be gone when Wisdom returns and if not one of the kids from Iowa that ready to come up then possibly a trade for an upgraded bat will make Mastrobuoni disappear, I just dont see him providing much offensively when needed.
I like to have guys on the bench that you can put in for 2-3 games or more if a regular has to take a couple days off or goes on Il for an injury or whatever reason and you can trust their replacement can at least be somewhat productive over that time to help the lineup and not just be a hole in the lineup that just filling a spot.
That what I see Mastrobuoni and Madrigal as being, a hole in the line up when their in it.