Because the guys you sign can be traded at the deadline for more prospects. A guy like Latos could be signed to a 1 year deal, and if he proves healthy and effective, could be given a QO and give the Braves a draft pick. Signing a proven MOR guy like Leake to a 4-5 year deal could allow the Braves to trade away a couple of their non-elite pitching prospects for a bat.
This FA market is loaded, especially compared to what will be available next offseason. No sense in outbidding other teams for any player right now, but if a couple bargains are sitting out there in January it would be wise to grab them. Add talent any way you can at this point, including bargain FAs.
I wouldn't personally advocate for a Leake signing - there's going to be enough of a market for him and those other second-tier starters (Samaedzija/Lackey/Kennedy/Kazmir/Gallardo/Fister/Happ/Iwakuma/Lincecum/Colby Lewis) that you're still more than likely going to have to pony up 3-4 years at $10+ million per to get.
We all understand the near-impossibility of correctly pinning the Braves' budget down. but I've updated my spreadsheet following the Maybin deal and now have the current number at $88,100,000 - that includes all attainable bonuses (Pierzynski's in particular) and Toscano's money included. I treat the Maybin deal is a wash - the Angels sent us the $2,500,000 that we gave the Tigers when we got Aybar.
Given that - I'd assume the absolute max we've got left is $31,900,000 (to fall under Hart's $120 million ceiling he mentioned last winter). I know it's not "sexy", but I honestly do think you could put a much more competitive team on the field than we had last season by just picking up the crumbs and signing guys to one year deals with every intention of trading them come July.
1/2.) Sign Latos and Bartolo Colon for $8 million each. Give Folty and Banuelos until the deadline to force their way into the rotation from Gwinnett and if they don't use them as big pen upgrades moving forward. Perez and/or Weber go to the pen and Gant joins Folty, Banuelos, Sims and Jenkins in Gwinnett's rotation to begin the season.
Cost: $16 million - leaves you $15,900,000.
3/4.) Re-sign KJ for $4 million. Probably unfair to expect him to do what he did when he was here last year, but you can always hope. If Garcia and Olivera flop, you've got a quality option for a bat behind them.
Cost: $4 million - leaves you $11.9 million.
5/6.) Sign EOF and Oliver Perez for $3 million each. Two lefties you could likely move at the deadline.
Cost: $6 million - leaves you $5.9 million.
Opening Day Roster
RF- Markakis, SS- Aybar, 1B- Freeman, C- Pierzynski, LF- Olivera, 2B- Peterson, 3B- Garcia, CF- Bourn
Bench: C- Bethancourt, 2B/SS/3B- Castro, 1B/2B/3B/LF- Johnson, LF/RF/1B- Swisher, CF- Perez/Smith
Rotation: Miller/Teheran/Colon/Wisler/Latos
Pen: Grilli/Vizcaino/O. Perez/Withrow/EOF/Perez or Weber/Winkler (with Simmons when healthy, Folty, and Banuelos to replace traded or struggling guys)