As a reference, here's a breakdown of the payroll for 2014. I'll try to keep it updated as best I can when moves are made.
Guaranteed contracts: Gerald Laird ($1.5M), Dan Uggla ($13M), B.J. Upton ($13.45M), Justin Upton ($14.25M), Jonny Venters ($1.625M)
Total: 4 players*, $43.865 million
Uggla could be traded, but even if he is, the Braves will still be paying him close to the $13 million figure. I still expect him back for 2014.
Arbitration: Brandon Beachy ($900K), Freddie Freeman ($4.9M), Jason Heyward ($4.5M), Chris Johnson ($4.2M), Craig Kimbrel ($7.25M), Kris Medlen ($5.9M), Mike Minor ($3.5M), Ramiro Pena ($600K), Jordan Schafer ($1M), Jordan Walden ($1.5M)
Total: 10 players, $34.25 million
The salary projections were done by Matt Swartz at MLBTradeRumors, and can be found here.
Minimum salary: Luis Avilan, David Carpenter, Evan Gattis, Andrelton Simmons, Julio Teheran, Alex Wood
Total: 6 players, $3 million
These are the minimum guys that I think are locks to make the team. Cory Gearrin, David Hale, and Anthony Varvaro will fight for bullpen roles behind the front four of Kimbrel, Carpenter, Walden and Avilan. Christian Bethancourt will try to get his nose in ahead of Evan Gattis, while Jose Constanza, Todd Cunningham, Phil Gosselin, Tyler Pastornicky, and Joey Terdoslavich will angle for bench spots.
GRAND TOTAL: 20 players*, $81.075 million
So, that leaves something like $19 million to spend based on a $100 million payroll. (The asterisk represents the fact that Jonny Venters isn't factored into in the player counts since he won't be available on Opening Day. His salary is counted, however.)
The depth chart would look as follows, based on the information outlined above:
C Evan Gattis
1B Freddie Freeman
2B Dan Uggla
3B Chris Johnson
SS Andrelton Simmons
LF Justin Upton
CF B.J. Upton
RF Jason Heyward
C Gerald Laird
IF Ramiro Pena
OF Jordan Schafer
SP Mike Minor
SP Kris Medlen
SP Julio Teheran
SP Alex Wood
SP Brandon Beachy
RP Craig Kimbrel
RP David Carpenter
RP Jordan Walden
RP Luis Avilan