Batted ball strikes roof over fair territory: In Play.
If caught by fielder, batter is out and runners advance at own risk.
Batted ball strikes roof over foul territory: Dead Ball.
MOVEMENT OF ROOF AND/OR WALL PANELS:
Please refer to MLB Standards 1-11 regarding the opening and closing of retractable roofs and/or wall panels and, where applicable, supplement with each individual ballpark’s guidelines for their retractable roof and/or wall panels.
HOUSTON ASTROS RETRACTABLE ROOF GUIDELINES
Conditions under which starting a game with a closed roof at Minute Maid Park is considered:
Threat of rain
Threat of excessive wind (above 30 mph sustained)
Air temperature or heat index readings above 86 degrees for a night game. Air temperature or heat index readings above 84 degrees for a day game (However, it should be noted that a mid-80's temperature with low humidity will most likely be played open)
Air temperature below 65 degrees for a night game
We will consider opening the roof at the conclusion of the 6th inning when the heat index is at or below 86 degrees and conditions are clear
Universal Ground Rules:
The Commissioner's Office has issued the following Universal Ground Rules for use in all Major League ballparks this season. Ground Rules pertaining to individual parks are posted separately in those parks.
Ball on the top step (lip) of the dugout is in play.
No equipment is permitted to be left on the top step (lip) of the dugout. If a ball hits equipment left on the top step it is dead.
A player is not permitted to step or go into a dugout to make a catch.
A player is permitted to reach into a dugout to make a catch. If a player makes a catch outside the dugout and the player's momentum carries him into the dugout, then the catch is allowed and the ballis dead. See Rule5.09(a)(1) Comment.
A batted ball in flight can be caught between or under railings and around screens.
A catch may be made on the field tarp.
Batted or thrown ball lodging in the rotating signage behind home plate or along first base or third base stands is out of play.
Batted or thrown ball resting on the rotating signage behind home plate or along first base or third base stands is in play.
The facings of railings surrounding the dugout and photographers areas are in play.
Any cameras or microphones permanently attached on railings or along outfield walls are treated as part of the railings or outfield walls and are in play.
Any recessed railings or poles that are in the dugout and photographers areas are out of play and should be marked with red to mark them out of play.
Robotic cameras or audio equipment attached to the facing of the backstop screen are considered part of the screen.
A batted ball striking the backstop camera or audio equipment is considered a dead ball.
A thrown ball striking the backstop camera or audio equipment is considered in play.
A ball striking the guy wires that support the backstop is a dead ball.
A ball lodging behind or under canvas on field tarp is out of play.
A ball striking the field tarp and rebounding onto the playing field is in play.
No chairs can be brought out of the dugout or bullpen and onto the playing field.