BB picked Henry over Kane for recruiting purposes, so be it.
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I think there's a good chance that Purdue is experiencing a new staff bump, and that Walters' staff will continue to recruit.
Walters has swag, and a #1 D in the country resume to pimp everywhere he goes... Bielema sort of built Purdue a recruiting demon... and then (probably) miscalculated on retention of the rest of the staff.
I'm not sure how you can let 1/2 of your staff follow Walters to a conference rival. Gotta know that's going to hurt in the end. They know all of the warts. In perfect 20/20 hindsight, this looks awful.