Just because I don't feel like working today, here's the whole
league and their corresponding Peanuts character (descriptions from
Wikipedia).
Steve = Charlie Brown. The main character, an everyman with ever-changing mood and grace; both
befriended by all and ostracized by everyone; a loser-yet-leader who
rises out of every downfall with shining hope and determination.
Robby
= Peppermint Patty. A freckle-faced tomboy who loves Charlie Brown;
leader of a baseball team and is one of Charlie Brown's rival
managers.
Linus = Me. Charlie Brown's blanket-toting best friend; the
most insecure but the smartest out of all the characters, with the most
intellectualism; a philosopher and theologian.
Travis = Lucy. A crabby, malicious and moronic girl who likes to torment others often, especially Charlie Brown and Linus
Franklin = Maine. The African-American child; has smarts comparable to Linus; manages
a baseball team that has rivaled Charlie Brown's.
Mike Frank = Marcie. The bespectacled character; calls Peppermint Patty "Sir"; secretly likes Charlie Brown
Mike Cole = Rerun. Younger brother of Linus; often took his siblings' places and roles.
Rich = Violet.
Lucy's best friend; a mean and snobby girl; served as an early love interest of Charlie Brown
Brad = Schroeder. A piano-playing character; Lucy's love interest; Charlie Brown's second best friend after Linus.
Sean = Pig-Pen. The character who attracts dust, making him very filthy.