I'd be less surprised if they traded Narveson, who's younger, cheaper, and not quite as good. That way spots 1-4 in the rotation are hugely experienced/successful starters and the #5 spot can be filled by Fiers/Peralta/Estrada -- in other words, someone younger & cheaper than Narveson. Narveson isn't eligible for arbitration yet, so if a rookie will be cheaper, it would be relatively little difference - $30k or so. It's rare for a team to only have 6 starters in a season. If some team gives up a lot to get Narveson, it would be worth exploring, but he shouldn't be a target to be moved. Fiers, Peralta, etc can still use development time in the minors and would be options if needed during the season.