A friend who works in radio emailed me a couple weeks ago to ask about organ music at baseball games — if it still exists, which teams use it, whether all organists can get down as hard on “Jeremiah Was a Bullfrog” as former Shea Stadium organist Ray Castoldi . (Yes, I know Jane Jarvis is the Shea Stadium organist, forever and ever, but I was one year old when she retired) Except for the third, “Jeremiah”-related question — to which the answer is ‘no, they cannot get down that hard’ — I wa