Is Jim Harbaugh In A Walking Boot?

While hanging with some of his former Stanford players during his trip out west, a photo showed up on Twitter of Jim Harbaugh apparently in a walking boot.  It didn’t appear that Harbaugh was wearing anything when he helped coached the Oakland A’s, so maybe it’s a recent injury?

https://twitter.com/JustJoshin90/status/574441331889590272/

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Nonetheless, I’m sure Harbaugh’s injury won’t stop him from participating in football drills once practice starts up again.