Major League Baseball players can be traded if they are under contract or if they were drafted in the previous year. Trades can be made at any time between the end of the World Series and July 31st of the following season, which is the non-waiver trade deadline.http://assets.espn.go.com/mlb/s/transanctionsprimer.html

After the non-waiver deadline, a player must clear waivers before he can be traded. When a team places a player on waivers, other teams have three days to submit claims for him. If a team submits a claim, the waiving team can either arrange a trade with the claiming team, pull the player off waivers, or award him to the claiming team outright. The White Sox acquired outfielder Alex Rios on waivers from the Toronto Blue Jays during the 2009 season.http://blogs.chicagosports.chicagotribune.com/sports_hardball/2009/08/white-sox-acquire-alex-rios-.htmlhttp://assets.espn.go.com/mlb/s/transanctionsprimer.html

If more than one team submits a waiver claim for a player, the team with the worst record in the same league as the player's current team is awarded the claim. If no team within a player's league submits a claim, the team with the worst record in the other league is awarded the claim. If a player clears waivers, the club can assign him to the minors, trade him (even after the trade deadline) or release him outright.http://assets.espn.go.com/mlb/s/transanctionsprimer.html

If a player has logged ten years of major league service time, including the last five with his current club, he earns no-trade protection and has the right to decline any trade.http://assets.espn.go.com/mlb/s/transanctionsprimer.html

The most significant trade in recent White Sox history was the acquisition of right-handed pitcher Jake Peavy from the San Diego Padres on August 1st, 2009. Despite a lingering ankle injury and a failed attempt to land Peavy earlier in the year, Sox GM Kenny Williams traded four young pitchers for the 2007 NL Cy Young Award winner. The pitchers were righties Dexter Carter and Adam Russell and lefties Clayton Richard and Aaron Poreda. Peavy is expected to be the Sox' No. 2 starter in 2010 behind Mark Buehrle and help anchor a talented rotation that also includes Gavin Floyd, John Danks and Freddy Garcia.http://sports.espn.go.com/chicago/news/story?id=4369814

The Sox have long been rumored to have interest in San Diego Padres first baseman Adrian Gonzalez.http://www.chicagotribune.com/sports/baseball/whitesox/ct-spt-0301-white-sox-chicago--20100228,0,7757164.story The rumor gained momentum when 2009 trade acquisition Jake Peavy acknowledged he had endorsed Gonzalez when White Sox GM Ken Williams asked for Peavy's opinion.http://www.chicagotribune.com/sports/baseball/whitesox/ct-spt-0301-white-sox-chicago--20100228,0,7757164.story Nothing has come of the rumor yet as the Padres are believed to want a package starting with young Sox second baseman Gordon Beckham.http://www.chicagotribune.com/sports/baseball/whitesox/ct-spt-0301-white-sox-chicago--20100228,0,7757164.story

No trades yet.

• January 14, 1963: Traded shortstop Luis Aparicio and outfielder Al Smith to the Baltimore Orioles for 3rd baseman Pete Ward, outfielder Dave Nicholson, shortstop Ron Hansen and pitcher Hoyt Wilhelm.http://www.baseball-almanac.com/teams/white_sox_01.shtml

• January 20, 1965: In a three-team trade with the Cleveland Indians and Oakland Athletics, acquired catcher Johnny Romano, pitcher Tommy John and outfielder Tommy Agee for outfielders Jim Landis and Mike Hershberger, pitcher Fred Talbot and catcher Cam Carreon.http://www.baseball-almanac.com/teams/white_sox_01.shtml

• May 16, 1978: Less than a year after acquiring him, traded Bobby Bonds to the Texas Rangers for Claudell Washington and Rusty Torres.http://www.baseball-almanac.com/teams/white_sox_05.shtml

• July 29, 1989: Traded outfielder Harold Baines and infielder Fred Manrique to the Texas Rangers for pitcher Wilson Alvarez, outfielder Sammy Sosa, and infielder Scott Fletcher.http://www.baseballforum.com/baseball-history-teams-yester-year/58902-worst-trades-baseball-history.html

• March 30, 1992: Traded outfielder Sammy Sosa and pitcher Ken Patterson to the Chicago Cubs for outfielder George Bell.http://www.baseballforum.com/baseball-history-teams-yester-year/58902-worst-trades-baseball-history.html

• July 31, 1997: Traded pitchers Wilson Alvarez, Danny Darwin and Roberto Hernandez to the San Francisco Giants for pitchers Keith Foulke, Bob Howry, Lorenzo Barcelo and Ken Vining, shortstop Mike Caruso and outfielder Brian Manning.http://www.baseball-reference.com/bullpen/White_Flag_Trade

• July 30, 2004: Traded pitcher Esteban Loaiza to the New York Yankees for pitcher Jose Contreras.http://www.baseballforum.com/baseball-history-teams-yester-year/58902-worst-trades-baseball-history.html

• October 26, 2005: Traded outfielder Carlos Lee and minor league first baseman Travis Hinton to the Milwaukee Brewers for outfielder Scott Podsednik and pitcher Luis Vizcaino.http://www.beyondtheboxscore.com/2007/10/24/82521/068

• December 3, 2007: Traded minor league first baseman Chris Carter to the Arizona Diamondbacks for outfielder Carlos Quentin.http://sports.espn.go.com/mlb/news/story?id=3140006