Relievers could be rushed if they have the goods, but Sameniego was coming off the internal brace procedure last season and probably needs at least a pit stop at MLB before he goes straight from AA to MLB. No reason to rush him as he's not a Watson/Whitlock/Slaten Rule 5 guy. He could be good enough to make the roster, but he's not on the 40 man, so other guys are going to get a crack at it first.