I don't see where you would get the idea of him never being healthy, because he's only missed 8 games in his last seven seasons, and 7 of those were last year.
It's a decent move IMO, the pickings are slim at DT on the market and you never know what you're getting with the draft. The staff looks to be positioning itself to take BPA available no matter on offense or defense. I'd still prefer defense, but hey, if the draft strategy isn't broke, don't fix it.:9: