No
The Raiders won their first regular season game on Sept 25th 1960 but their first preseason win was August 7th.
The Oakland Raiders won 5 games in 2008
No
Baltimore Colts
1-3 only preseason win came against buffalo
The first time the RAIDER's won was in 1997
The Packers were the preseason favorites to win the Super Bowl in the 2010-2011 season.
The Raiders have six wins to four for the Cowboys. 1974 - Raiders win 27-23 1980 - Cowboys win 19-13 1983 - Raiders win 40-38 1986 - Raiders win 17-13 1992 - Cowboys win 28-13 1998 - Raiders win 13-12 2001 - Raiders win 28-21 2005 - Raiders win 19-13 2009 - Cowboys win 24-7
raiders
Oakland raiders
12 in total. (That's with preseason included.) Preseason excluded would be 11.
The Miami Dolphins did not win all of their preseason games in 1972. They were 3 and 3 in the preseason. Interestingly, their last loss in preseason game 5 (August 31, 1972) was to the Washington Redskins, 27 - 24.