Originally Posted by Benihana
No - K's incorporate movement on pitches. Doesn't matter (and likely won't ever matter) if you can throw 95 MPH if it's straight as an arrow.
Guys like Kyle Lotzkar who have a lot of raw talent but couldn't ever harness control/command etc. (partially due to injuries) did and still do strike out a lot of batters. Carlos Marmol would be the big league example of that.
Either way, there's more to striking out batters than having a good arm. Without actually watching him pitch, I think it's a big jump to say he doesn't have the arm to succeed. Especially this early.