Football is played on a gridiron, in a stadium, sometimes called soldier field or war memorial stadium. Baseball begins in the spring, when everything is being reborn. Football begins in the fall, when everything is dying. In football you wear a helmet. In baseball you wear a cap.
Football is concerned with downs.
Baseball is concerned with ups. In football you receive a penalty. In baseball you make an error. Football has hitting, clipping, spearing, piling, personal fouls, late hitting, and unnecessary roughness. Baseball has the sacrifice.