Even DOB states the Ms are not going to give up Walker for 1 year of JUp:
http://emeraldcityswagger.com/2014/1...-justin-upton/
And I think they are right...6 years of Walker is worth more than 1 year of JUp at $14M. Seattle does have other pieces that would interest the Braves though. The young IFers Miller and Taylor as well as their current RFer Saunders. Miller hits LHed, so I think he would be the target so he could platoon with Goss and CJ at 2B and 3B until Peraza is ready.
I think a trade along the lines of Gattis/JUp for Walker/Miller/Saunders makes a lot of sense. Walker completes the rotation, Miller plays 2B/3B, and Saunders replaces Heyward in RF. The Braves could then sign Tomas for LF.
This makes a lineup towards the end of 2015 and beyond of:
C - CB
1B - Freeman
2B - Peraza
3B - Miller/CB
SS - Simmons
LF - Tomas
CF - Saunders/who knows
RF - who knows/Saunders
Bench - Goss, BJ, backup C, LHed hitter
Rotation - Teheran, Wood, Walker, Minor, Miller