Enfranchised in 1977, the Seattle Mariners already have a smattering of milestones to their credit including four Baseball Hall of Fame inductees, Randy Johnson's 1990 no-hitter, Ken Griffey Jr. and Sr. playing on the same roster, a 1995 AL West title, 2001's record setting 116 win season, and Ichiro's 2004 single season hit record.
The Mariners' retro-style Safeco Field is one of the most beautiful ballparks in the country. It's also one of only a handful of stadiums with a retractable roof (which can open or close in 10-20 min.), allowing the Mariners a real grass playing field without the worry of getting rained out.
You can come see Ichiro, Felix Hernandez, and Franklin Gutierrez battle for a top spot amongst the AL West division this season.