I didn't follow his stats or anything (Are there stats on long snappers??), but it seems to me over the past year or two he's had more than the usual number of screwups for the position, one in which perfection is nearly possible, frankly: not the most demanding role in the game, after all.. It was a great story, and he had a good run, but I think he had to go simply on merit. I don't think it's necessary to invoke any "culture building" voodoo to explain his departure. His job performance declined - as it does for everyone at some point in any area of endeavor - and now he's retired, probably quite happily.