Position switches are extremely difficult in the NFL, especially one as drastic as going from quarterback to safety. Showers certainly has the athleticism to play on special teams, which is what caught the coaches' eyes last summer. Whether he owns the instincts to hang around on defense remains to be seen.
Good for Showers to realize his path to playing quarterback was blocked -- and likely would stay that way. There are worse jobs in the world than getting paid a solid sum to run down a kick returner.