HARWICH, Mass. — For Adrian Brickhouse, it was a little bit surreal to watch his son Spencer win Cape Cod League All-Star Game MVP honors for the victorious West team on Sunday night.

“This is incredible,” the elder Brickhouse said. “Never thought this would have happened when he was 5 years old and you’re throwing to him in the backyard, so this is an incredible experience.”

Of course, it didn’t take long for the Brickhouse family to realize that Spencer might just have a future in baseball.

“Well, I’ll tell you when he was 6 in coach-pitch, I watched him hit it off the base of a 200-foot fence to score three in the final inning,” Adrian said. “I think at that point is when we kind of realized there was something special there.”

On Sunday, Brickhouse not only hit...