Tracking Obstruction

[Manny A]

This is probably a pretty minor issue. But in NCAA play, when a fielder is guilty of certain types of obstruction, she must be issued a warning. A subsequent obstruction violation by the same fielder results in added penalties, even ejection.

My question: How is that warning recorded so that umpires can keep track? Does the BU who saw and called the obstruction inform the plate umpire to annotate on the lineup card? Or is this something the BU is supposed to maintain on a separate piece of paper?

I did a Juco DH a couple of weeks ago, and I had a first baseman who obstructed the BR as the BR attempted to round first base. I made the appropriate award, and informed her and her coach that she had her first warning. But then when I went back to my position, I thought, "I hope I remember that I gave her that warning," which made me wonder if I should have made sure my partner was aware.