Pitcher Substitution
 

Under strict OBR, under what circumstances would the pitcher NOT be allowed to return to the mound to pitch later in the game?

Left the game?
 

Once pitcher leaves the starting line-UP to the bench, he cannot return.

Rule cite please.

You are kidding, right?
There is no re-entry in "strict OBR".

Please see the "whats the rulebook say" thread.

I don't believe that someone actually needs this but here it is.

OBR 3.03
A player, or players, may be substituted during a game at any time the ball is dead. A substitute player shall bat in the replaced player's position in the team's batting order. A player once removed from a game shall not re enter that game. If a substitute enters the game in place of a player manager, the manager may thereafter go to the coaching lines at his discretion. When two or more substitute players of the defensive team enter the game at the same time, the manager shall, immediately before they take their positions as fielders, designate to the umpire in chief such players' positions in the team's batting order and the umpire in chief shall so notify the official scorer. If this information is not immediately given to the umpire in chief, he shall have authority to designate the substitutes' places in the batting order. A pitcher may change to another position only once during the same inning; e.g. the pitcher will not be allowed to assume a position other than a pitcher more than once in the same inning. Any player other than a pitcher substituted for an injured player shall be allowed five warm up throws. (See Rule 8.03 for pitchers.)

The original poster asked about the pitcher returning to the mound, not necessarily re-entering the game. It's possible he simply switched positions.

This is the original post: "Under strict OBR, under what circumstances would the pitcher NOT be allowed to return to the mound to pitch later in the game?"

He wanted to know when the pitcher would NOT be allowed to return to the mound.

Bob

And the answer would be "whenever he had already left and returned to the mound once in that same inning."

Thanks- this is what i was asking.

So you're saying a pitcher can leave and return to the mound every inning if he wishes as long as he stays in the lineup?

Also, if the coach violates the charged conference rule, the pitcher is done pitching for the day, correct?

Yes -- and under strict OBR, the pitcher must be removed from the game on the second visit. (Most non-pro leagues would allow the pitcher to remain in the game at another position.)