By Conor Orr They watched as he was carted off with his knee in shambles. Now, Robin and Jimmy Burrow are watching their son on the precipice of a Super Bowl. The biggest worry for the Burrows these days is figuring out exactly how they’ll squeeze Mike into a checked bag for their flight. Mike is the family’s three-foot-tall stuffed Bengal tiger that sits on the hood of their rental car during pregame tailgate parties. He has developed a reputation as a talisman of sorts for Robin and Jimmy, the parents of the quarterback who has gifted the city of Cincinnati its first playoff victory in three…