What is the result of Herrmann running for F2 and later trying to pinch-hit for F4 in the same half-inning?

In baseball, the rules governing substitutions are quite specific, particularly regarding players running and then attempting to substitute in an at-bat within the same half-inning. Herrmann running for F2 (the catcher) and then attempting to pinch-hit for F4 (the shortstop) creates a scenario that violates substitution rules.

Once Herrmann has entered the game as a runner for F2, he has officially participated as a player in that inning. The act of pinch-hitting for F4 means that Herrmann would be attempting to substitute into a different role on the field while already engaged as a runner. According to the rules, a player who has been used as a substitute cannot then later enter the game in a different capacity, leading to the conclusion that such a move would be illegal.

As a result, this situation results in an out, as the attempted pinching-hitting for F4 is not permitted under the established guidelines for substitutions. Thus, the action that Herrmann attempts after having already participated in the inning as a runner invalidates his ability to then affect the game in another capacity, confirming that the outcome of the scenario is indeed considered illegal.