Recap
The Mariners were created as a result of a lawsuit. In 1970, in the aftermath of the Seattle Pilots' purchase and relocation to Milwaukee as the Milwaukee Brewers by Bud Selig, the city of Seattle, King County, and the state of Washington (represented by then-state Attorney General and future U.S. Senator Slade Gorton) sued the American League for breach of contract. Confident that Major League Baseball would return to Seattle within a few years, King County built the multi-purpose Kingdome, which would become home to the National Football League's expansion Seattle Seahawks in 1976. The name "Mariners" was chosen by club officials in August 1976 from over 600 names submitted by 15,000 entrants in a name-the-team contest.
Ken Griffey Jr. holds six single-season batting records and an individual career record for the Mariners franchise.
The Mariners played their first game on April 6, 1977, to a sold-out crowd of 57,762 at the Kingdome, losing 7–0 to the California Angels. The first home run in team history was hit on April 10, 1977, by designated hitter Juan Bernhardt.
That year, star pitcher Diego Seguí, in his last major league season, became the only player to play for both the Pilots and the Mariners. The Mariners finished with a 64–98 record, echoing the record the 1969 Pilots once held; however, the team was able to avoid last place in the AL West by half a game. In 1979, Seattle hosted the 50th Major League Baseball All-Star Game. After the 1981 season, the Mariners were sold to California businessman George Argyros, who in turn sold the team to Jeff Smulyan in 1989, and then to Nintendo of America in 1992.
During the 1992–93 offseason, the Mariners hired manager Lou Piniella, who had led the Cincinnati Reds to victory in the 1990 World Series. Mariner fans embraced Piniella, and he would helm the team from 1993 through 2002, winning two American League Manager of the Year Awards along the way.
The 2001 Mariners club finished with a record of 116–46, leading all of Major League Baseball in winning percentage for the duration of the season and easily winning the American League West division championship. In doing so, the team broke the 1998 Yankees American League single-season record of 114 wins and matched the all-time MLB single-season record for wins set by the 1906 Chicago Cubs. At the end of the season, Ichiro Suzuki won the AL MVP, AL Rookie of the Year, and one of three outfield Gold Glove Awards, becoming the first player since the 1975 Boston Red Sox's Fred Lynn to win all three in the same season.
On October 22, 2008 the Mariners announced the hiring of Jack Zduriencik, formerly scouting director of the Milwaukee Brewers, as their general manager. Weeks later, on November 18, the team named Oakland Athletics bench coach Don Wakamatsu as its new field manager. Wakamatsu and Zduriencik hired an entirely new coaching staff for 2009, which included former World Series MVP John Wetteland as bullpen coach. The off-season also saw a litany of roster moves, headlined by a 12-player, 3-team trade that included sending All-Star closer J. J. Putz to the New York Mets and brought 5 players—including prospect Mike Carp and outfielder Endy Chávez from New York and outfielder Franklin Gutiérrez from the Cleveland Indians—to Seattle. Many of the moves, like the free-agent signing of Mike Sweeney, were made in part with the hope of squelching the clubhouse infighting that plagued the Mariners in 2008. It also saw the return of Seattle favorite Griffey Jr. The 2009–10 offseason was highlighted by the trade for 2008 American League Cy Young Award winner Cliff Lee from the Philadelphia Phillies, the signing of third baseman Chone Figgins and the contract extension of star pitcher "King" Félix Hernández.
The Mariners fired field manager Don Wakamatsu along with bench coach Ty Van Burkleo, pitching coach Rick Adair and performance coach Steve Hecht on August 9, 2010. Daren Brown, the manager of the AAA affiliate Tacoma Rainiers, took over as interim field manager. Roger Hansen, the former Minor League catching coordinator, was promoted to bench coach. Carl Willis, the former Minor League pitching coordinator, was promoted to pitching coach.
Dave Niehaus, the Mariners' play-by-play announcer since the team's inception, died of a heart attack on November 10, 2010, at the age of 75. In memory of Niehaus, Seattle rapper Macklemore wrote a tribute song called "My Oh My" in December 2010. He performed the song at the Mariners' Opening Day game on April 8, 2011.
On April 21, 2012, Philip Humber of the Chicago White Sox threw the third perfect game in Chicago White Sox history against the Mariners at Safeco Field in Seattle. It was the 21st perfect game in MLB history. Mariners starting pitcher Kevin Millwood and five other pitchers combined to throw the tenth combined no-hitter in MLB history and the first in team history on June 8, 2012. The last combined one occurred in 2003, when six Houston Astros no-hit the New York Yankees in New York. The six pitchers used in a no-hitter is a major league record. Félix Hernández pitched the first perfect game in team history, shutting down the Tampa Bay Rays 1–0 at Safeco Field on August 15, 2012. It was the 23rd perfect game in Major League Baseball history. The Mariners became the first team in Major League Baseball to be involved in two perfect games in one season.
General Manager (GM) Jack Zduriencik was relieved of his position by the team on August 28, 2015. Jerry Dipoto, who formerly served as GM of the Los Angeles Angels of Anaheim, was hired as the new GM of the Mariners one month later. On October 9, 2015, manager Lloyd McClendon was fired, and the search for a new manager was begun. Scott Servais was named the new Mariners' manager on October 23, 2015.
Nintendo of America issued a press release on April 27, 2016, stating it would sell most shares it held of Seattle Mariners ownership to First Avenue Entertainment limited partnership. Nintendo retained a 10% ownership share of the team after the sale was completed in August 2016