Help me move some surplus! (PRONK, et al)

[Sid Bream's Slide]

Okay, guys. I've tried posting some specific trades in the Draft/Trade/Keepers forum, but I haven't gotten the answers that I've been looking for, so I'll leave this a little bit more open-ended.

H2H, 5x5(OBP), Keep 6 (Keeper Cost = Round Taken, listed in parentheses)

Before I paste the teams: Through trades, I've acquired one too many 1B. I'm looking to unload Hafner to a guy who's been targeting him since the beginning of the season. He also wants Bill Hall and Josh Barfield. My main question - what should I be trying to get from him, according to my team's needs? I'm already going to have a tough choice with keeping only 6, so I don't mind giving up Hafner, who would cost me a 4th round pick.

My team:
Batters
C - Ivan Rodriguez (9)
1B - Prince Fielder (13)
2B - Kazuo Matsui (Last available round)
3B - Alex Rodriguez (Keeper ineligible)
SS - Bill Hall (8)
OF - Carlos Beltran (3)
OF - Grady Sizemore (5)
OF - Johnny Damon (6)
Util - Travis Hafner (4)
BN - Mark Teahen (Last available round)
BN - Josh Barfield (Last available round)
BN - Alex Gordon (11)
BN - Derrek Lee (Keeper ineligible)
DL - Rickie Weeks (10)

Pitchers
SP - Roy Oswalt (Keeper ineligible)
SP - Cole Hamels (21)
RP - Jose Valverde (19)
RP - Al Reyes (Last available round)
P - Chris Young (17)
P - James Shields (Last available round)
P - John Maine (Last available round)
BN - Tim Lincecum (Last available round)
BN - Chad Cordero (7)
BN - Homer Bailey (Last available round)

His team:
Batters
C - Joe Mauer (6)
1B - Nick Swisher (12)
2B - Howie Kendrick (8)
3B - David Wright (Keeper Ineligible)
SS - Michael Young (4)
OF - Vernon Wells (7)
OF - Brad Hawpe (16)
OF - Curtis Granderson (Last available round)
Util - Ryan Braun (Last available round)
BN - Julio Lugo (11)
BN - Chris B. Young (11)
DL - Mark Teixeira (Keeper Ineligible)

Pitchers
SP - Dan Haren (14)
SP - Josh Beckett (8)
RP - Billy Wagner (5)
RP - Chris Ray (18)
P - C.C. Sabathia (10)
P - Ben Sheets (3)
P - Justin Verlander (21)
BN - Ted Lilly (Last available round)
BN - Barry Zito (4)
BN - Ervin Santana (Last available round)

Thanks a lot, guys and gals. Leave a link, and I'll help as best I can.