Was That Cosmo Kramer Spotted Taking A Swim In NYC East River Passing Roosevelt Island Today?

This afternoon, a swimmer, accompanied by a kayaker and small boat, was spotted swimming in the East River passing Roosevelt Island.

Could it be Cosmo Kramer looking for a place to swim without crowds?

Or maybe a Roosevelt Island resident looking for a place to swim until the Sportspark Pool, currently closed for renovations, reopens next spring?

UPDATE - A reader tipped us off that the swimmers are probably from the NY Open Water swim group..