Injured or Ejected Player
 

What is the ruling for injured or ejected players in ASA/NSA?USSSA SP? Is the spot in the lineup an automatic out?

ASA - Rule 4, Section 1, D

Injured player = out
Ejected = forfeit

Unless, of course, a substitute is available.

NSA 4-4-c
If an injury drops a team from 11 to 10, 10 to 9, 9 to 8, then yes the empty spot in the lineup is an automatic out. But with 2 outs you cannot walk intentionally or unintentionally to get to that out. Also you cannot have catcher's obstruction or a HBP to the previous batter. If those happen you waive the automatic out and move to the next person in the lineup.

NSA 5-3-e-7
If an ejection drops a team from 9 to 8, then the game is forfeited.

If you have a substitute then ignore the above.

USSSA 5.2: Playing Short
To paraphrase, the team may continue play for any reason other than ejection. The absent spot in the lineup is an automatic out. A player who has left the game may not return later in the game unless she left the game under the "blood rule".