|2009 Detroit Tigers|
|Slogan: "Always a Tiger"|
|Major League affiliations|
|General manager(s)||Dave Dombrowski|
|Local television||Fox Sports Detroit|
(Mario Impemba, Rod Allen)
|Local radio||Detroit Tigers Radio Network|
(Dan Dickerson, Jim Price, John Keating)
|< Previous season Next season >|
The 2009 Detroit Tigers season was the team's 109th season. The Tigers' new slogan for 2009 was "Always a Tiger." It replaced the 2006–2008 slogan "Who's Your Tiger?"
The Tigers ended the season on October 6 with a 6–5 loss in 12 innings to the Minnesota Twins in the tie-breaker game to win the AL Central. The Tigers spent 146 days in first place and became the first team in Major League history to lose a three-game lead with four games left to play.
On July 30, the Tigers traded outfielder Josh Anderson to Kansas City for cash considerations.
On July 31, the Tigers traded rookie left-handed pitcher Luke French and left-handed pitcher Mauricio Robles to Seattle for veteran left-handed starting pitcher Jarrod Washburn.
On August 17, the Tigers traded pitcher Brett Jacobson to Baltimore for Aubrey Huff.
The Tigers' home opener was on April 10 against the Texas Rangers. The Tigers won that game 15–2, which included a grand slam by Miguel Cabrera and finished the series with a sweep.
The Tigers swept their rivals the Indians in Cleveland during the second weekend of May. The Tigers also completed back-to-back sweeps in May, against the Athletics and the Rangers. The Tigers also completed back-to-back sweeps in late June, over the Brewers and Cubs.
On May 15, the Tigers hit 2 grand slams in a game, only the third time in team history.
On June 19, Instant replay was used twice in the Tigers' 10–4 victory over the Milwaukee Brewers at Comerica Park, the first time that's happened in league history. Miguel Cabrera's third-inning single off the top of the wall is called a home run after instant replay review shows that it had actually cleared the wall. Contrarily, Dusty Ryan's fourth-inning home run was overturned to a ground rule double. Later that weekend, the Tigers won the series with a sweep.
On May 19, Dontrelle Willis and four relief pitchers combined to throw a one-hitter in a 4–0 Tigers Victory. Willis had a stretch in which he retired 17 straight batters 
The Tigers completed back-to-back sweeps against the Indians and Rays in early September.
The Tigers held the 1st-place position from May 8 until they lost it to the Twins in the tiebreaker game on October 6.
The Tigers swept the Indians for the third time of the season in late September.
|Chicago White Sox||79||83||0.488||7½||43–38||36–45|
|Kansas City Royals||65||97||0.401||21½||33–48||32–49|
|2009 Detroit Tigers|
|Tigers win||Tigers loss||Game postponed|
Through September 17, 2009
|Josh Anderson *||74||165||40||.242||0||16|
|Jeff Larish *||32||74||16||.216||4||7|
|Aubrey Huff *||40||106||20||.189||2||13|
|Dane Sardinha *||12||31||3||.097||0||3|
|Matt Treanor *||4||13||0||.000||0||0|
Pitchers batting statistics not included
|Lucas French *||7||29+1⁄3||1||2||3.38||19|
|Dontrelle Willis *||7||33+2⁄3||1||4||7.49||17|
|Freddy Dolsi *||6||1||0||0||0||1.69||3|
|Joel Zumaya *||29||3||3||1||7||4.94||30|
|Juan Rincón *||7||1||0||0||0||5.23||10|
|Clay Rapada *||2||0||0||0||0||7.71||2|
|Chris Lambert *||2||0||1||0||0||14.85||4|
* No longer on active roster
See also: Minor League Baseball
|AAA||Toledo Mud Hens||International League||Larry Parrish|
|AA||Erie SeaWolves||Eastern League||Tom Brookens|
|A||Lakeland Flying Tigers||Florida State League||Andy Barkett|
|A||West Michigan Whitecaps||Midwest League||Joe DePastino|
|A-Short Season||Oneonta Tigers||New York–Penn League||Howard Bushong|
|Rookie||GCL Tigers||Gulf Coast League||Basilio Cabrera|