[Manny A]

College game situation: Starting F3 is #10. In the top of the second inning, #10 singles. Head coach enters #7 to run for her. In the bottom of the second, #7 remains in the game to play F3.

Two innings later, #7 gets on base on a walk, and the head coach enters #25 to run for her. At the end of the inning as he walks from the third base box to his team's dugout on the first base side, the head coach tells the PU that he is going to re-enter starter #10 to play F3. The PU goes over to inform the opposing team that #25 is being replaced by #10.

As the PU heads toward home, he glances over at first base, and sure enough, he sees #7 tossing warm-up grounders to the infielders. Now what to do?

NCAA rule 8.3.4 covers Illegal Players, of which #7 is one (only starters, not subs, can re-enter in college ball). Under that rule, #7 may be discovered by her own coach (which calls for #7 to be ejected, but there is no other penalty), or by the opposing team at a point in time which benefits them (such as when she makes a play, and then the offense has the option of accepting the play or the penalty if done before the next pitch). There's a note in the rule that says, "Violation of the illegal-player rule may be reported to the plate umpire at any time."

Does that mean that when the PU sees #7 out there, he/she cannot say or do anything to prevent a problem? What should the PU say/do, if anything?