[SanDiegoSteve]

As long as both teams agree to the loaning of the player(s), I've never prohibited it in a youth ball game. If it were for the league championship, no they couldn't do it, but that's unlikely to happen in a league championship game.

Now if one team only has nine, and the other is short a player or more, then we have a good old fashioned forfeit on our hands. There has to be enough subs on the team that is loaning the player(s). I would not let them use starters.

And if a team has an ejection that brings them down to eight players, game over.