A block "C" in red against a blue field, the cap logo of the Cleveland Indians Major League Baseball club.
Modified from <a class="external free" href="https://commons.wikimedia.org/wiki/File:Cleveland_Indians_primary_logo.svg">https://commons.wikimedia.org/wiki/File:Cleveland_Indians_primary_logo.svg</a> by user SixFourThree
mlb.com/indians.com