From Muppet Wiki

Ferret Jeeter is a baseball star who went to Hazelnut High School with Bear and played baseball with him on the same high school team.

Ferret Jeeter appears in the Bear in the Big Blue House episode "At the Old Bear Game." He is the shortstop for the Sequoia City Big Bats. He is a very talented player and the spokesperson for the soda Clammy Cola. Pip and Pop are big fans of his.

The character is a spoof of Yankees shortstop Derek Jeter.