Of our pitchers that were on the roster last year, who is the most expendable, or the most likely to be traded? 

I have chosen the players I have noticed mentioned the most on AN, and other places. 

Chad Gaudin:  Gaudin is young enough to attract potential teams, and showed great promise last year....before flaming out in the second half.  He could be a valuable trading chip, but the fact he battled injury(ies) last year doesn't help. 

Justin Duchscherer:  An All Star reliever that always had what it took to start.  He has come out of the gate impressively, minus the start he missed while injured, could also be an attractive find to a team in need of SP, or even RP.  He can bolster a rotation or help anchor a bullpen, which ups his value.  His versatility makes him easier to trade. 

The down side, his going under the knife this offseason, and his early injury don't help.  His continued strong outings should help ease any apprehension from another GM that is looking into him. 

*Duchscherer is in a contract year, and he probably won't be resigned.  If he is still pitching very well and the A's are contending, Beane might be willing to let him play the whole season out and hope he is a Type A free agent. 

Joe Blanton:  The most durable pitcher on the A's rotation, and appointed ace of the staff.  I think that by default alone he has been given this title, because your ace usually is a dominant pitcher.  Consistent is a better word than dominant when describing Big Joe.  That being said, he certainly has some value, just ask the Rockies.  I bet that come the deadline in July, Beane will be choosing which pocket he wants to pick in exchange for Blanton. 

Huston Street:  I've recently read here that closers are easy to come by.  Are they?  Street hasn't been the healthiest of the bunch, and I'm not sure he's the dominant pitcher that we all thought he was going to be.  I do like Street, he has what it takes mentally, and Troy Percival is a good example of how quickly you can turn it around.  Not by any means is Street performing poorly, but the fact that people on AN are willing to trade him has to say something about some of their opinions of him.

My vote is Joe Blanton.  He is not an ace, but if his value were to dictate otherwise, which I think it will, he's the one.  What do you think?