In baseball, the specialists comes in to relieve somebody. Football has hitting, clipping, spearing, piling on, personal foul, late hitting, and unnecessary roughness. Baseball has the sacrifice. Football is played in any kind of weather, rain, snow, sleet, hail, fog, can't see the game, don't know if there is a game going on, mud on the field, can't read the uniforms, can't read the yard markers, the struggle will continue. In baseball, if it rains, we don't go out to play.
Baseball has the seventh inning stretch.
Football has the two minute warning. Baseball has no time limit, we don't know when it's gonna end, we might have extra innings. Football is rigidly timed and it will end even if we have to go to sudden death. In baseball, there's kind of a picnic feeling in the stands during the game. Emotions may run high or low, but it's not that unpleasant.