Darren Howard played some DT right after we signed Will Smith, not Grant.
Howard wasn't very enthusiastic about it however, he had just been franchise tagged and was concerned about his stats for a long-term deal. Grant, having already gotten his long-term deal, should be significantly more accommodating.
We have about 3 dozen threads on this you may want to check out, a lot of people have voiced a lot of different and interesting opinions.
I'll tell ya this right now.. after watching the Giants totally disrupt/dismantle the Patriots offense in the Super Bowl I wouldn't doubt if a LOT of teams brought out a 3-DE pass rush vs. pass happy teams like New England.. If anything the Giants showed how speed can murder a timing offense.. Now, I also believe that Payton probably watched the game too and figured "hey, we got a DE that "could" be a DT in passing situations (Grant), so let's go get us a DE that can bring heat and get all 3 of'm on the field at the same time".. Think about it for a second, how exactly did the Saints get beat last year ?? Answer= through the air they got absolutely raped!! and why ?? because the opposing QB had all friggin' day to throw.. and why ?? zero pass rush !!.. So yes, I could see Grant moving into a DT-type position to bring additional heat, he's a big boy that can bring it.. now you add McCray & Smith to the equation and (at least on paper, camp will be the tell-tale) you've got a formidable pass rush that won't give opposing QB's much time to get rid of the rock.. The Giants "blueprinted" how to stop N.E., I think other teams (including the Saints) have taken notice.