Worried about Griffin?

Konnor Griffin has been off to a rocky start at the plate. He’s only 9 games and 29 at-bats into his career, but the metrics also don’t side with him much. He’s not the guy rocking the baseball and just having bad luck. He is great on the bases, but it’s a matter of him getting there. Since everyone around baseball said this guy would be a star, should they have a long leash here?