Given the Twins' history with concussions and the dollars that they have committed to Mauer, I think that it would be a bad idea to let him player catcher any more. On the other hand, if I had time I would like to work with some engineers to develop a catcher's helmet that absorbs more of the energy from a fouled baseball. The shock absorbers on a car absorb a lot of energy and it seems to me that the same principal (and other principals of physics) could be applied to make catchers' helmets a lot better.