|Detroit Tigers – No. 18|
|Infielder / Outfielder|
May 10, 1986 |
|Bats: Right||Throws: Right|
|September 5, 2008 for the Seattle Mariners|
(through May 22, 2013)
|Runs batted in||27|
Youth career 
Tuiasosopo played for the Woodinville West Little League at the 1998 Little League Western Regional Tournament in San Bernardino, California. Woodinville West lost to Cypress Federal in a championship game that lasted 7 innings. This is the farthest WWLL has made it into the Little League All Star Tournament.
Tuiasosopo signed a professional baseball contract after graduating from Woodinville High School. Although he chose baseball, Tuiasosopo had a promising high school football career. He was selected to play in the 2004 U.S. Army All-American Bowl. Before signing as a professional baseball player, he signed a letter of intent to play football at the University of Washington.
Professional career 
The Seattle Mariners drafted Tuiasosopo 93rd overall in the third round in the 2004 Major League Baseball Draft. He began his pro career with the Peoria Mariners in 2004, hitting a solo home run in first career-at bat on July 10. Tuiasosopo hit safely in 18 of 20 games and reached base safely in 19 of 20 games. He had a 13-game hit streak, hitting .467 from July 10–25, and tied for the team lead in home runs with four. On August 5, he was promoted to the Everett AquaSox. At the end of the season he participated in the 2004 Arizona Instructional League.
He recorded a season-high 13-game hitting streak to start the season, batting .423 with eight runs, three doubles, two home runs and 12 RBIs during that time. Tuiasosopo had 27 multi-hit games, three four-hit games and six three-hit games. He hit home runs in back-to-back games on June 9 and 10.
In 2006, he split time between the Mariners' High-A Inland Empire 66ers and Double-A San Antonio Missions affiliates. He batted a combined .248 with two home runs and 44 RBI. He played with the Peoria Javelinas of the Arizona Fall League that fall.
He hit .306 with one home run with 34 RBIs, 31 runs scored and five stolen bases in 59 games with Inland Empire but only batted .185 with one home run, 16 runs scored and 10 RBIs with San Antonio.
Tuiasosopo spent the 2007 season with the Double-A West Tenn Diamond Jaxx. He hit .424 with eight runs, five doubles and three RBIs during a season-high 10-game hitting streak from April 5–14. He recorded a double in five consecutive games from April 6-1.
He was named to the Southern League All-Star team and later that season played for the Peoria Javelinas in the Arizona Fall League.
Until September 2008 he was playing with the Triple-A Tacoma Rainiers.
He finished the 2008 season batting .281 with Tacoma and .159 with the Mariners.
He made the 2009 Opening Day roster for the Mariners.
Tuiasosopo hit two home runs against the Portland Beavers on August 28 helping the Rainiers to their seventh straight victory. He finished the season batting .261 with 11 home runs and 35 RBIs in 59 games for the Rainiers. In four playoff games, he batted .313 with one home run and four RBIs.
|“||We all knew that if we were in the running, all of us would be here in the playoffs, because we know how important that it was, The organization thinks it's important winning in the Minor Leagues, so we knew that we were going to be around and we just wanted to keep winning. We wanted to see if we could get that ring. That was important to all of us in that room there.||”|
On September 27, during the pre-game show on 710 ESPN Radio, color man Mike Blowers predicted that Tuiasosopo would hit his first major league home run in his second at bat of the game on a 3–1 fastball into the left center field second level of Rogers Centre. Sure enough, in the fifth inning of their game against the Toronto Blue Jays, Tuiasosopo delivered, although the home run went above the left field bullpen on technically what is the first level of the stadium.
He spent time in the major leagues with the Seattle Mariners during the 2010 season. He has played his first major league games at shortstop, first base, and in the outfield.
Tuiasosopo signed a minor league contract with the New York Mets on January 27, 2012.
Tuiasosopo signed a minor league contract with the Detroit Tigers on December 6, 2012. On March 26, 2013, citing an impressive spring that saw Tuiasosopo hit .327 with four home runs and 10 RBIs, Tigers manager Jim Leyland announced that Tuiasosopo had made the major league team.
Personal life 
Tuiasosopo is the brother of Marques and Zach, and the son of Manu Tuiasosopo. His father and brothers played football in college, with Manu attending UCLA and his two older brothers attending the University of Washington.
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- Matt Tuiasosopo homers twice in Rainiers victoryseattletimes.nwsource.com
- Mariners promote three from Triple-A mariners.com
- Another taste of Majors for Tuiasosopo mariners.com
- Blowers Sees the Future - Precisely - for Tuiasosopo Greg Johns, seattlepi.com, 29 September 2009
- Call of the Year Shannon Drayer, mynorthwest.com, 28 September 2009.
- Sipple, George (March 26, 2013). "Rick Porcello wins Tigers' No. 5 starter role; Matt Tuiasosopo makes team". Detroit Free Press. Retrieved March 26, 2013.
- Shelburne, Ramona (September 30, 2005). "He's got a name: Tuiasosopo serves as A.V. signal caller". Inland Valley Daily Bulletin. Retrieved March 26, 2013.
- Career statistics and player information from MLB, or ESPN, or Baseball-Reference, or Fangraphs, or The Baseball Cube, or Baseball-Reference (Minors)