third base
Turner Field.
Yes.
Rubber
46 feet. http://www.sportsknowhow.com/Baseball/field-dimensions/little-league-baseball-field-dimensions.html
The US Cellular field is a baseball field located in Chicago, Illinois. The US Cellular field is home to the Chicago White Sox who currently play in the Major League Baseball's American League.
A lacrosse field is 330 feet X 180 feet in dimension. A baseball field is 325 feet from Home Plate to the outfield wall on the left and right field foul lines, and 400 feet from Home Plate to the center field wall. (These are minimum dimensions as described in the Official Baseball Rules.) So although they are different shapes, the fields are quite similar in size.
A pentagon.
Well I'm not sure, but i think the rockies own the largest stadium.
An American football field is 300 feet X 160 feet in dimension. A baseball field is 325 feet from Home Plate to the outfield wall on the left and right field foul lines, and 400 feet from Home Plate to the center field wall. (These are minimum dimensions as described in the Official Baseball Rules.) So although they are different shapes, the fields are quite similar in size.
seattle mariners
the 2 circles by home plate on a baseball field are called the on-deck circles and they are for the next player up to bat to warm up before going to home plate