Thanks, everyone. To be honest, I was paying more attention to the outfielder than to where the runner was. The kid has a good arm, he was charging in, and when he booted it I followed the ball instead of looking to the runner. By the time I did see the runner he was past third base. I think if fielded cleanly he would have had a good shot at the guy at home, but the whole play happened very quickly. I did not give an error, but I think it was a play that could have been made. Appreciate everyone's insights!