A coach who stayed late with you for free gave you something a paycheck can’t measure.

Extra time given for free is a different thing from the job somebody is paid to do. An adult who stays after practice with you is spending their own evening, and the message underneath it is that they thought you were worth it. That lands deeper than any drill they taught you.

Tell that person you remember, plainly and without a speech, even if it is years late. Then do the same for somebody younger when your turn comes.