They play their games at Safeco Field.
The Kingdome. The Mariners played home games at the Kingdome between April 6, 1977 and June 27, 1999.
It is the park where the Mariners play home games.
Just like all Major League teams, the Mariners have a 81 game home schedule.
The Seattle Mariners of the American League plays their home games in the State of Washington.
Boston
Bill Hall's First Home Run On The Mariners
W.A.C.A. Ground
Because America was discovered and settled on the East coast. Therefore most authority during its early settlement came from the surrounding areas. It expanded and finally reached the west coast after decades, for a long time the west was looked at as home to barbarians (native americans). For quite awhile the east coast was the only civil and settled place, also it has always been home to the nations capital. Washington D.C. is one of the most central political location in the world if not the most central.
seattle mariners
NBA teams play 41 home games and 41 away games. Typically schedules will have road trips. So an east coast team may play 4 or 5 teams on the west coast in a row (and vice-versa).
A Little Rare.