Jose Peterson was only in "Peanuts" randomly between 1967 and 1969 (though he was apparently a groundbreaker -- one of a very few Hispanic characters in comics). I always remember him though because he later popped up when I was reading the Peanuts Parade collections (these are perhaps the awesomest books collecting comic strips ever)
Anyway, I always remember him. He had kind of Linus hair, but darker and more of it, and more flattered, like he sported a perennial case of hat head. He never spoke. He briefly played on Charlie Brown's baseball team thanks to Peppermint Patty, and was an awesome player. He had lived in both New Mexico (a nod to his Mexican heritage, I guess) and North Dakota (a nod to his Swedish side). And just when Charlie Brown was agonizing that Peppermint Patty had taken over his team, she and Jose bailed for the team in their own neighborhood. And headed off for a meal of Swedish meatballs and tortillas. Which sounded so exotic to me at the time, but now just sounds yummy.
The Peanuts wiki points out the (again, silent) appearance of a kid who has Jose's hair two years after his only real plotline. (Third panel.) After that, it was it. Adios, Jose.