Yes.
Yes they did.
You use a baseball to play the game baseball. If you really look at the name you see the first part of the word is base. In the game of baseball you run the bases every time you get a hit.
New York Yankees
horse racing was probably the first sport to use the term triple crown. obviously, this term is used in other sports such as baseball, but it originated from horse racing.
baseball
The Astrodome, home of the Houston Astros, starting in 1965.
Washington Senators in the 1950s (specifically, Jim Lemon 1B)--(from dahuppster)
Yes, they were the first professional baseball franchise
the first baseball bat was made out of wood
You cannot steal first base in baseball.
The baseball cleat was first used in 1966 in baseball but they used it first in the Super Bowl