This article is a list of seasons completed by the San Francisco 49ers, an American football franchise representing the San Francisco Bay Area.
 The 49ers are members of the West division in the National Football Conference (NFC) of the National Football League (NFL).
 The list documents the season-by-season records of the 49ers' franchise from to present, including postseason records, and league awards for individual players or head coaches.
 The San Francisco 49ers began play in 1946 as charter members of the All-America Football Conference.
The National Football League (NFL) is a professional American football league consisting of 32 teams, divided equally between the National Football Conference (NFC) and the American Football Conference (AFC).
 The NFL is one of the four major professional sports leagues in North America, and the highest professional level of American football in the world.
 The NFL was founded in 1920.
 In the course of its existence, it has merged with the All-America Football Conference and the American Football League (AFL) to create the current NFL.
 The All-America Football Conference merged with the NFL in , and the AFL merged with the NFL in .
 The history and records of the AFL were incorporated into the NFL.
The Seattle Seahawks are a professional American football team based in Seattle, Washington.
 They are members of the Western Division of the National Football Conference (NFC) in the National Football League (NFL).
 The team, along with the Tampa Bay Buccaneers, joined the NFL in 1976 as expansion teams.
 The Seahawks are the only team to have played in both the American Football Conference (AFC) and NFC Championship Games.
 The team has made three Super Bowl appearances; they lost to the Pittsburgh Steelers in Super Bowl XL, before winning Super Bowl XLVIII against the Denver Broncos.
 The Seahawks then lost Super Bowl XLIX to the New England Patriots.
The National Football Conference (NFC) is one of the two conferences of the National Football League (NFL), the highest professional level of American football in the United States.
 This conference and its counterpart, the American Football Conference (AFC), currently contain 16 teams each, making up the 32 teams of the NFL.
 Both conferences were created as part of the 1970 merger with the rival American Football League (AFL), with all ten of the former AFL teams and three NFL teams forming the AFC while the remaining thirteen NFL clubs formed the NFC.
 A series of league expansions and division realignments have occurred since the merger, thus making the current total 16 clubs per conference.
The National Football Conference (NFC) is one of two conferences within the National Football League (NFL), the American Football Conference (AFC) being the other.
 Prior to 1970, there were two separate professional football leagues, the National Football League and the American Football League (AFL).
 In 1970, the AFL merged with the NFL.
 As part of the merger, the former AFL teams, plus three former NFL teams (the Baltimore Colts, the Cleveland Browns and the Pittsburgh Steelers), were placed into the AFC.
 The remaining former NFL teams were placed in the NFC.
 As of August 14,2017, only the Detroit Lions have not won an NFC championship.
The Seattle Seahawks are a professional American football franchise based in Seattle, Washington.
 The Seahawks compete in the National Football League (NFL) as a member club of the league's National Football Conference (NFC) West division.
 The Seahawks joined the NFL in 1976 as an expansion team.
 The Seahawks are owned by Paul Allen and are currently coached by Pete Carroll.
 Since 2002, the Seahawks have played their home games at CenturyLink Field (formerly Qwest Field), located south of downtown Seattle.
 The Seahawks previously played home games in the Kingdome (1976–1999) and Husky Stadium (1994, 2000–2001).
The American Football Conference (AFC) is one of the two conferences of the National Football League (NFL), the highest professional level of American football in the United States.
 This conference and its counterpart, the National Football Conference (NFC), currently contain 16 teams each, making up the 32 teams of the NFL.
 Both conferences were created as part of the 1970 merger with the rival American Football League (AFL), with all ten of the former AFL teams and three NFL teams forming the AFC, and the remaining thirteen NFL clubs forming the NFC.
 A series of league expansions and division realignments have occurred since the merger, thus making the current total 16 clubs per each conference.
William H. Dugan (born June 5, 1959 in Hornell, New York) is an American former professional American football offensive lineman in the National Football League for the Seattle Seahawks, Minnesota Vikings, and the New York Giants.
The Tampa Bay Buccaneers (often shortened as the Bucs) are a professional American football franchise based in Tampa, Florida.
 The Buccaneers currently compete in the National Football League (NFL) as a member team of the National Football Conference (NFC) South division.
 Along with the Seattle Seahawks, the team joined the NFL in as an expansion team.
 The Bucs played their first season in the American Football Conference (AFC) West division as part of the 1976 expansion plan, whereby each new franchise would play every other franchise over the first two years.
 After the season, the club switched conferences with the Seahawks and became a member of the NFC Central division.
 During the 2002 league realignment, the Bucs joined three former NFC West teams to form the NFC South.
 The club is owned by the Glazer family, and plays its home games at Raymond James Stadium in Tampa.
The National Football League (NFL) is a professional American football league consisting of 32 teams, divided equally between the National Football Conference (NFC) and the American Football Conference (AFC).
 The NFL is one of the four major professional sports leagues in North America, and the highest professional level of American football in the world.
 The NFL's 17-week regular season runs from early September to late December, with each team playing 16 games and having one bye week.
 Following the conclusion of the regular season, six teams from each conference (four division winners and two wild card teams) advance to the playoffs, a single-elimination tournament culminating in the Super Bowl, which is usually held in the first Sunday in February, and is played between the champions of the NFC and AFC.

Question: Who is the owner of the team that Bill Dugan played American football for in the National Football Conference (NFC) West division?
Answer: Paul Allen