Maybe the pitching coach. Actually, as I think about it, an arrangement like Zimmer has with the Vikes. Molitor runs the offence and fielders, and Allen handles the pitching staff.
Reading the baseball threads gives me the tremors. But I do remember back in my youth when I was studying geophysics at the U of M spending some time watching the seismometers and seismographs deep in Pillsbury Hall, and using time differences between S-waves and P-waves to compute distance from the epicenter of a quake in South America. This used formula developed by Dr. Richter and his associate Dr. Gutenberg at CalTech.