"Meanwhile, Matusz struck out eight in four innings in his last outing, thanks to two plus breaking pitches: his "knockout" curveball in the 75-79 mph range, and a mid-80s slider with good, late tilt. The lefty is also working consistently at 91-92 mph, touching 93 and mixing in a solid mid-80s circle change to any batter who is sitting on a breaking ball.
Matusz was the fourth overall pick this June, and considering he's making his professional debut here at the Arizona Fall League, the results are even more impressive.
So where does Matusz begin the season next year? Last year, O's pitcher Jake Arrieta made his pro debut at the AFL and didn't allow an earned run, then spent the whole season at high Class A despite pitching well. However, Matusz has a more advanced feel for pitching and better overall command than Arrieta, and it wouldn't be a stretch to see Matusz start right at Double-A and advance quickly through the minors. He's a very polished pitcher right now, and he looks like he'll eventually be a No. 2 starter in the big leagues."