Define, "Layed an Egg". Was it in a showcase game, or are you talking really bad metrics. Baseball is a game of failure, striking out, an error, they happen. Kind of hard to lay an egg on exit velo and other metrics unless hurt or has problems handling pressure.
I'd say of course he can overcome it, depending on how he handled the failure in front of the coaches. Part of the best recruiting I've heard coaches say is seeing how a player handles adversity, if he can go back and show better next time, it is a huge positive. If he stomped around throwing gear or telling everyone he's better than that out loud, I'd say he's done there.
Most coaches can tell skill regardless of outcome, kids tend to be outcome based when it comes to evaluating their own performance.