He's basically been an everyday player since his call-up in early May. Jose Molina is the Angel's back-up catcher, and Jeff Mathis is knocking on the door, but Napoli just took his opportunity and ran with it, bouncing above Mathis in the Depth Chart. I've had him since mid-June, when I traded away Ben Molina. And he's been a consistently good power option from the C position. Unless he gets traded (and from what he's done so far, I think Mathis may be out before Napoli is), he's definitely worth the roster spot. Drop Javy for him, no doubt.
He's like Russ Martin Plus.