Worth noting about Powell is that, at this point, he appears to be one of those reverse split lefties, ala Ichiro and Aoki. I like those guys!
Pizzano wears out RHP, mostly. Over the past three seasons he's walked 128 times vR and K'ed only 89! Bet'cha Dipoto noticed that on Day 1. Even in Pizzano's "slumpy" '14 (mosly BABIP driven) he had on OBP of .366 vR. I'm really glad, and not at all surprised, that he got the invite. In one interview, Pizzano indicated that he was about to get the Tacoma call-up last year, just prior to the injury.
And I still really like Tyler Smith. Surprised he's not on the list. His total MiLB fielding %/Rng9 are .960 and 4.64. Marte's are .944 and 4.53. In Seattle, Marte was .960 and 4.37. In Seattle, Chris Taylor has been .962 and 4.36. In the minors he has been .950 and 4.48. I haven't seen Smith field much , but indications are he has the glovey chops to play up. And he's pesky with the bat.