I don't get the mindset of using a roster spot in such a way that the entire team is weakened 98% of the time just in case a 2% edge case comes up in which that move might prove helpful.
I can see it now, the stars align, the O's are at home, tied game in the 10, Mateo pinch runs for Frazier, he gets ready to steal third...and the leadoff hitter hits a dong.