Alberto Castillo, relief pitcher
Is he a viable candidate for a left-handed one-out relief pitcher?
Absolutely.
Is he a viable candidate for a larger role?
Absolutely not. He is a sidearm pitcher and very vulnerable to right-handed batters, which sort of rules out a set-up or closer role. Nor does he have the stuff to overcome that. His limit is that of the left-handed Mike M.’s, Mike Myers and Mike Munoz.
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