Using the Seattle Times as a source, here’s as close as I can get to a complete list of how your old 2013 Sounders became your NEW 2014 Sounders. For the purpose of this list, I’m mainly only counting players who actually played or are expected to play.

If you remember, we ended 2013 on a sad note. Here’s what the roster looked like as the players packed up their gear in October 2013 (Starter types listed first).
GK: Gspurning, Hahnemann, Ford, Weber
DEF: Yedlin, Hurtado, Traore, Gonzales, Scott, Ianni, Burch, Remick
MID: Alonso, Evans, Rosales (c), Neagle, Moffat, Rose, Caskey, Joseph, Zakuani
FOR: Dempsey, Johnson, Martins, Estrada, Zavaleta (Note: I’m not sure when Ochoa was released.)
Non-Factors: Lund, Bates

So let’s see what happened next:
11/19: Alonso gets a new contract with a DP slot.
11/20: Evans gets long-term deal.
These two things mean that Dempsey, Martins and Alonso are your 3 DP’s, and Evans is presumably taking a good sized share of the salary cap. So now the team needs to trim payroll.

So…
12/10: OUT: Michael Gspurning, March Burch, Steve Zakuani

12/11: OUT: Mauro Rosales to Chivas USA
12/11: IN: FOR Tristan Bowen from Chivas USA and No. 2 in Allocation Order
The Rosales deal ends up being very interesting for the Sounders. Chivas takes on an older, expensive player, gives up a younger, cheaper one, AND gives Seattle a high spot in the Allocation order, which becomes interesting later. Then later in the off-season, Chivas ownership sells the team back to the league.

12/10: IN: GK Stefan Frei TO Sounders from Toronto for 2015 1st Round Pick
12/12: IN: DEF Chad Marshall TO Seattle from Columbus for 2015 3rd round pick and Sounders Allocation placement
Remember, the Sounders got Chivas’ Allocation placement, so now they didn’t need theirs. Gspurning’s salary goes to Frei. Burch’s to Marshall (roughly).

12/12: Ford gets new deal to be 3rd string Goalie
12/13: IN: FOR Kenny Cooper to Seattle from Houston for Adam Moffat
12/16: Gonzales gets a new 1 year deal

12/17: OUT: Johnson to DC for allocation money
This has to happen because the team can’t afford Evans AND Johnson as non DP’s.

12/18: IN: FOR Chad Barrett via re-entry draft

1/6: Neagle gets extension
1/8: Hahnemann gets extension
1/9: IN: Homegrown players Sean Okoli and Aaron Kovar

1/16: OUT: Hurtado and Ianni (and No 13 Pick in 2014 Draft) to Chicago
1/16: IN: DEF Jalil Anibaba (and No 8 pick in 2014 Draft) from Chicago
This is a 2 for 1 deal. Sounders have too many center backs and need to cut some more costs.

1/31: IN: MID Marco Pappa via Allocation Draft
Remember the Rosales for Bowen deal? Now, it’s become Rosales for Bowen and Pappa. Nice.

2/28: OUT: Zavaleta loaned to Chivas USA
Now, that deal has sort of become Rosales and Zavaleta (on loan) for Bowen and Pappa.

Undated: OUT: Joseph training with New England

Grand total
OUT: Gspurning, Hurtado, Ianni, Burch, Joseph, Rosales, Zakuani, Johnson, Zavaleta (Loan)
IN: Frei, Marshall, Anibaba, Pappa, Cooper, Barrett, Bowen, Okoli, Kovar
KEPT/ENDORSED: Hahnemann, Ford, Gonzales, Alonso, Evans, Neagle
NO CHANGE: Yedlin, Scott, Traore, Remick, Rose, Caskey, Estrada, Dempsey, Martins
OTHER: Ockford (Loaned out), Lowe, Periera

Got it? Make sense? Good.