What NFL player has played for the most different teams?

EDIT - This answer has been edited from my original answer of Jeff George, who played for 7 teams.

The record for most teams played for by an NFL player is shared by Chris Chandler, Mark Royals and Karl Wilson (although Chandler is the only player to have started for eight different teams). This record is 8 different teams.

http://en.wikipedia.org/wiki/Chris_Chandler

Wrong. The answer is actually Chris Chandler. He has played for 8 teams the Indianapolis Colts, Tampa Bay Buccaneers, Phoenix Cardinals, Los Angeles Rams, Houston Oilers, Atlanta Falcons, Chicago Bears, and St. Louis Rams

Truth be told, there are 4 players with 8 teams...

Jeff Brady, Linebacker
1991 PIT
1992 GNB
1993 LAM
1993 SDG
1994 TAM
1995-97 MIN
1998 CAR
1999 IND

Chris Chandler, Quarterback
1988-89 IND
1990, 91 TAM
1991, 92-93 PHO
1994 LAM
1995-96 HOO
1997-01 ATL
2002-03 CHI
2004 STL

Mark Royals, Punter
1987 PHI
1987 SLC
1990-91, 99-01 TAM
1992-94 PIT
1995-96 DET
1997-98 NOR
2002, 03 MIA
2003 JAC

Karl Wilson, Defense
1987-88 SDG
1989 PHO
1990, 93 MIA
1991 LAM
1992, 93 NYJ
1993 SFO
1994 TAM
1995 BUF

Verified on http://www.databasesports.com/

J.T. O'Sullivan only played in regular season games for 4 different teams though.

Chandler only played for 7 different teams. The L.A. Rams (1994) and the St.Louis Rams (2004) are the same team.

The player who played in regular season games for the most different teams is Ben Agajanian with 9.

1945 PIT
1945 PHI
1947-48 LAD
1949, 1954-57 NYG
1953 RAM
1960, 1964 LAC/SDC
1961 DTX
1961 GNB
1962 OAK

J.T. O'Sullivan has played for TEN different teams: New Orleans Saints (2002-04); Green Bay Packers (2004); Chicago Bears (2005, 2007); Minnesota Vikings (2005); New England Patriots (2006); Carolina Panthers (2006); Detroit Lions (2007); San Francisco 49ers (2008); Cincinnati Bengals (2009-2010) San Diego Chargers claimed him off waivers in 2010.