He's barely had 1,000 PAs and less than two seasons worth of games in the majors and he's only 24. Sure there's reason for concern and he's got to stay on the field, but it's too early to panic yet. If this team is to take that next step though, Buxton and Sano have to figure things out and stay on the field. I do think it was a mistake to not send him on a rehab stint. He wasn't hitting before he got hurt. A short rehab stint, a couple of games, would be a decent way for him to settle in with the bat and get back up to speed. His defense is badly needed, but given how bad this division, there's no need to rush him back.