Baseball Draft Prospects

Fantasy Baseball – should I pick up Matt Wieters?
In a 10 team league, 20 players (including bench) per team
When my friend left the draft, Wieters was autopicked in round 16 of 20 as pick #160 overall. He dropped Wieters because he didn’t know he was a big prospect and he was listed as NA ( not available ) because he is still in the minors. Should I drop James Loney or Justin Duchscherer to pick him up?
Also my current catcher is Mike Napoli, not great but an acceptable catcher.
Drop Loney,Wieters has huge potential..
(If you were in my league I’d tell you to drop Dutch,he’s a solid SP.)
~g0()d LuCk!~
2006 Bowman Draft Picks and Prospects Baseball Box Break