It was January 20, 2003, and Jim and Megan McCarthy were getting ready to celebrate their son’s birth. As many soon-to-be dads are, Jim McCarthy was already a step ahead in his dreams for his boy. “It’s pretty much, long story short, my dad manifesting my entire life,” Michigan quarterback J.J. McCarthy told Michigan alum Rich Eisen on his show today. “It was right before I was born, and him going through the names with my mom and saying, ‘this is going to be daddy’s little quarterback.’ He only showed me this (video) like 6 months ago … said, ‘I was just waiting.’ He’s a patient guy.” But he …