I think signings like this one and the Royce Ring signing are to bolster system depth in case guys leave via trade. Certainly could be an element of wanting to expose the catchers to a knuckleball as well as one of wanting to take a shot to see if a tweak or two gets him going on the suggestion of a west coast scout, but I think it's more of a depth thing. If the Sox trade a starter or reliever from AA or AAA, you just plug one of those guys in and the team keeps chugging along.