![The Rookie mistake picture](/images/screenshots/305000-305999/305527_sm.jpg)
Other mistake: When Jimmy is putting the first newspaper article up on the bulletin board, the article is titled "Owls Win Fifth Straight", but the actual article text talks about the Owls having just played and lost the last game of the season that "not only knocked the Owls from post-season action, but ended a 17 game winning streak." (00:46:45)
Answer: It's never fully revealed, it seems David and his brother were playing, probably doing something that requires parental supervisor and was unable to save him. Again, probably David was the older one and his father believed he should have known better.