Which team was known as the Colt .45s before becoming the Astros in 1965?

Which team was previously known as the Seattle Pilots? Which team was originally the Washington Senators before moving to Minnesota in 1961? Which team was originally the second Washington Senators before moving to Texas in 1972? Which team was previously the St. Louis Browns? Which team played in Boston and Milwaukee before moving to Atlanta in 1966? Starting with which season did Cleveland's MLB team play as the Guardians? In what year did the Tampa Bay Devil Rays shorten their name to the Rays? Which two teams began play as expansion franchises in 1998?