Oakland Raiders
As of June 2014 Barry Bonds holds the record for most regular season homeruns. The record is 73 which beat Mark McGwire's record.
The most wins by the Raiders in a single season was 13. The Raiders accomplished that in 1967 and 1976.
Dallas. Through the 2016 season, the Cowboys have 493 regular-season wins and 34 playoff wins for a total of 527. The Raiders have 456 regular-season wins and 25 playoff wins for a total of 481.
The Yankees won 114 regular season games in 1998.
The most games won in a regular season by the Yankees was 114 games. In the 1998 season the Yankees record was 114-48.
The Mariners regular season record in 2001 was 116-46. They tied the 1906 Chicago Cubs for the MLB record for most victories in a regular season.
Brandon Marshall with 21 last season
22222
If you are referring to regular season games, then the Indianapolis Colts hold the record with 23 wins. (2008-2009)
According to profootballhof.com, the 49ers all time record as of the start of the 2007 season is 509-400-15 and the Raiders all time record is 421-319-11.
Dallas. Through December 17, 2017, the Cowboys have 501 regular-season wins and 34 playoff wins for a total of 535. The Raiders have 462 regular-season wins and 25 playoff wins for a total of 487.