Unowned
Isaac Mattson, P
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Scouting report
Of the several backspinning fastball types the Orioles have collected via trade over the last couple of seasons, Mattson is the one whose velocity has climbed. His fastball was up a tick at the alt site and his slider velocity climbed about five full ticks (from about 81 mph to 86), though he seems to be sacrificing command for power now. His fastball's carry makes it playable even at just 93 mph and I think that, plus his slider, will be enough for a middle-inning role. If he can learn to turn over a changeup consistently then he'll be able to start, but I'm not betting on that as Mattson approaches age 26. (Alternate site)