Adu, a one-time U.S. prodigy who debuted MLS in 2004 when he was 14, returned to MLS this season after an unsuccessful European stint and played 14 games in 2011 for the Union. He had two goals and assist.
Mexican international Bravo had nine goals and three assists in 27 matches for Sporting KC, which won the Eastern Conference regular season championship and advanced to the conference final in the playoffs.
The Montreal Impact join MLS in 2012, and will be able to select 10 players in the draft, which will be held at 3 p.m. (ET) Wednesday. Each MLS team had the opportunity to protect 11 players.
Generation adidas players (who did not graduate at the end of the 2011 season) and Homegrown players are automatically protected and do not count against a team's 11 protected roster spots. No team can lose more than one player in the draft.
Bravo is not the only designated player left unprotected, as Sporting KC also left Jeferson available, and Vancouver Whitecaps FC's Mustapha Jarju, Toronto FC's Julian de Guzman, New England's Revolution's Milton Caraglio, New York's Frank Rost, D.C. United's Branko Boskovic and Columbus Crew's Andres Mendoza are also available.
Following is a complete list of available players for the expansion draft:
Chicago Fire: Michael Banner, Diego Chaves, Jon Conway, Yamith Cuesta, Alec Dufty, Gabriel Ferrari, Dan Gargan, Baggio Husidic, Steven Kinney, Josip Mikulic, Cristian Nazarit, Daniel Paladini, Pari Pantazapoulos, Mike Videira, Kwame Watson-Siriboe.
Chivas USA: Sergio Arias, Andrew Boyens, Chukwudi Chijindu, Chris Cortez, Laurent Courtois, Simon Elliot, Victor Estupinan, Blair Gavin, Ante Jazic, David Junior Lopes, Michael Lahoud, Gerson Mayen, Marcos Mondaini, Zach Thornton, Mariano Trujillo, Zarek Valentin.
Colorado Rapids: Eddie Ababio, Andre Akpan, Quincy Amarikwa, Steward Ceus, Miguel Comminges, Stephen Emory, Caleb Folan, Mike Holody, Ian Joyce, Macoumba Kandji, Kosuke Kimura, Ross LaBeaux, Tyrone Marshall, Sanna Nyassi, Scott Palguta, Wells Thompson, Anthony Wallace.
Columbus Crew: Kevin Burns, Jeff Cunningham, Emmanuel Ekpo, Shaun Francis, Josh Gardner, Eric Gehrig, Cole Grossman, Andy Gruenebaum, Tommy Heinemann, Andres Mendoza, Justin Meram, Danny O'Rourke, John Owoeri, Santiago Prim, Alex Riggs, Dejan Rusmir, Ben Sippola, Corey Veeder, Joshua Williams.
D.C. United: Brandon Barklage, Branko Boskovic, Blake Brettschneider, Marc Burch, Steve Cronin, Austin Da Luz, Stephen King, Devon McTavish, Kurt Morsink, Joseph Ngwenya, Santino Quaranta, Jed Zayner.
Houston Dynamo: Brian Ching, Carlo Costly, Daniel Cruz, Hunter Freeman, Jason Garey, Evan Newton, Eddie Robinson, JeVaughn Watson, Cam Weaver.
LA Galaxy: Sean Alvarado, Chad Barrett, Chris Birchall, Paolo Cardozo, Adam Cristman, Leonardo Da Silva, Frankie Hejduk, Hector Jimenez, Bryan Jordan, Daniel Keat, Miguel Lopez, Dustin McCarty, Brian Perk, Dasan Robinson, Michael Stephens, Ryan Thomas.
New England Revolution: Darrius Barnes, Zak Boggs, Milton Joel Caraglio, Ryan Cochrane, Franco Coria, Mkhokheli Dube, Ryan Guy, Ryan Kinne, Alan Koger, Otto Loewy, Abdoulie Mansally, Tim Murray, Pat Phelan, Zack Schilawski, Andrew Sousa.
New York Red Bulls: Chris Albright, Stephane Auvray, Mehdi Ballouchy, Bouna Coundoul, Alex Horwath, Mychel Jones, Tyler Lassiter, Carlos Mendes, Brian Nielsen, Marcos Paullo, Carl Robinson, John Rooney, Frank Rost, Teddy Schneider, Greg Sutton.
Philadelphia Union: Freddy Adu, Juan Diego Gonzalez, Chase Harrison, Hasley Thorne Holder, Levi Houapeu, Morgan Langley, Justin Mapp, Stefani Miglioranzi, Kyle Nakazawa, Veljko Paunovic, Ryan Richter, Joe Tait.
Portland Timbers: Eric Alexander, Freddie Braun, Adin Brown, Michael Chabala, Bright Dike, Jake Gleeson, Kevin Goldthwaite, Eddie William Johnson, Rodrigo Lopez, Peter Lowry, James Marcelin, Ryan Pore, Steve Purdy, Chris Taylor, Spencer Thompson, Brian Umony, Sal Zizzo.
Real Salt Lake: Chris Agorsor, Jean Alexandre, Arturo Alvarez, Yordany Alvarez, Paulo Jr. Araujo, Cody Arnoux, Nelson Gonzalez, Ned Grabavoy, Rauwshan McKenzie, Timothy Melia, Kyle Reynish, Robbie Russell, Blake Wagner, Collen Warner, Andy Williams.
San Jose Earthquakes: Anthony Ampaipitakwong, Nana Attakora-Gyan, Bobby Burling, Bobby Convey, Ramiro Corrales, Joseph Gjertsen, Maxwell Griffin, Chris Leitch, Matt Luzunaris, Ellis McLoughlin, Jacob Peterson, Brad Ring, Scott Sealy, Tim Ward, Andrew Weber.
Seattle Sounders FC: Terry Boss, Servando Carrasco, David Estrada, Josh Ford, Michael Fucito, Leonardo Gonzalez, Taylor Graham, Patrick Ianni, Nate Jaqua, Roger Levesque, Bryan Meredith, Miguel Montano, Pat Noonan, James Riley, Amadou Sanyang, Zacharias Scott, Michael Seamon, Tyson Wahl, O'Brian White.
Sporting Kansas City: Olukorede Aiyegbusi, Omar Bravo, Daneil Cyrus, Ibrahim Diop, Jeferson, Michael Harrington, Eric Kronberg, Scott Lorenz, Lawrence Olum, Joseph Peterson, Craig Rocastle, Soony Saad, Luke Sassano, Seth Sinovic, Milos Stojcev, Shavar Thomas, Konrad Warzycha.
Toronto FC: Danleigh Borman, Elbekay Bouchiba, Adrian Cann, Kyle Davies, Julian de Guzman, Matt Gold, Leandre Griffit, Peri Marosevic, Javier Martina, Demitrius Omphroy, Nick Soolsma, Nathan Sturgis, Eddy Viator, Dicoy Williams, Mikael Yourasskowsky, Gianluca Zavarise.
Vancouver Whitecaps FC: Michael Boxall, Jeb Brovsky, Joe Cannon, Bilal Duckett, Greg Janicki, Mustapha Jarju, Jonathan Leathers, Alexandre Morfaw, Jay Nolly, John Thorrington, Pete Vagenas.