Okay, from the horse's mouth (so to speak): Mauer, 30, said it had been nearly two decades since he suffered his only previous diagnosed concussion. "I had one when I was young -- real young," Mauer said. "I was probably 10 or 11 years old. Something at school, maybe just horsing around. Banged my head. I don't really remember how long the symptoms lasted. Just being a kid, I guess." As for any concussions in the interim, which included a standout career as a high school all-America quarterback at Cretin-Derham Hall, Mauer said he has "probably had some along the way" but has never had "symptoms last this long." http://www.twincities.com/twins/ci_23974437/minnesota-twins-joe-mauer-speaks-about-concussion-recovery