American football has a playing field of 57,600 square feet, with 9,600 of those covering the two end zones. NHL hockey is played on a rink with 17,000 square feet. The regulation NBA basketball court covers 4,700 square feet.
The average playing field in major league baseball covers 2.49 acres, or 108,464 square feet. Target Field is a touch smaller at 107,593 square feet. Fenway Park in Boston, opened in 1912, has the smallest playing field at 99,000 square feet.
There are 34,000 square feet in the grass and dirt areas of a baseball infield, and another 77 square feet for the two batter's and the catcher's boxes.
The NFL starts a play with 22 players generally covering one-fourth of the field and about to engage in numerous collisions.
Hockey has 10 skaters in pursuit of an elusive rusk, while two mummified human targets remain vigilant as to the outcome of scrums for that hard, dry biscuit.
The NBA has 10 players battling for a much larger object, many defenders attempting to get close enough to an opponent to feel his breath — although, thankfully, that wasn't a problem with any of our Timberwolves after Robert Covington was traded.
Baseball is played in by far the largest area, with natural spacing, and with contacting an opponent as an irregular occurrence.
These are great advantages for baseball in our virus world, and should make it much easier to resume playing the actual game than for the other major sports.