I'd link it if not for Watterson's death bots making it a bitch to find story arcs of the comic, but in summary:
Calvin is peer pressured into joining his schools baseball rec team, is put into far right field, and manages to catch a ball, only for it to be revealed that the teams had switched and he had put a player on his own team out. He's yelled at, quits the team (naturally told to be a quitter by the coach), and proceeds to play Calvinball.
i work in a daycare so i get to watch land before time at least once a week, and it has that great commercial with the kid whose mom looks like a melting mimi from the drew carry show and its like pizza hut of your childhood dreams
The recent upload of that Birthday commercial that was on Land Before Time or whatever rocketed this video from my subconscious. I was going to submit it, but I'll just try to update this old dead link. This is embedded into my brain forever and I may just have it played on a loop at my funeral.