Courtesy Runner Etiquette

[CT1]

Originally Posted by onetime1

As an opposing coach should one report infraction immediately or wait for a pitch and claim this was an illegal subsitution and is there a penalty enforced?

This is not an illegal substitution, since CRs must be eligible substitutes. It's an unreported substitution. The CR is now in the lineup, and the P or C has been out of the game once and can reenter.

However, this can't take place in the same half-inning.