Ball sticking in screen in front of bleachers is a ground rule double. Ball sticking in vines on bleacher wall is a ground rule double. Ball coming out of vines is in play. Ball hitting left field or right field foul markers above painted mark is a home run. Ball hitting fould marker below painted mark and bouncing back on playing field is in play.
Ball going under grates in left field or right field and remaining there is a ground rule double.
By 1927, the park had assumed its current name in honor of new owner William Wrigley, and a second deck had been added, doubling the capacity to near 40,000. Since then, it has been modernized periodically, but has changed little in appearance or scope. Aside from its lack of lights, Wrigley Field's most distinctive feature has been its winds. Rather, the power alleys are only 10'-15' deeper, and home runs frequently leave the park completely, landing on either Waveland or Sheffield Avenue behind the tiny bleachers. There is little foul territory, and the field, of course, is natural grass.