re: A pitcher who can paint the corners is known as a "Rembrandt"

I played baseball from 5 years old to 18 years old and I pitched for nine of those years and I had never heard of that term. My 12 year old son played on a team last year and his coach was calling him "Rembrandt" and I Swear to God I thought he was talking about a toothpaste or something. I was thinking maybe it's because he smiles a lot. Didn't get it until I saw that commercial. And yes, the guy who called him that was a total douche.