Claim: The Jamestown Expos played in the New York–Penn League and the Pennsylvania–Ontario–New York League (a Minor League Baseball league which operated in the northeastern United States from 1939 to 2020), and their mascot was Yippee from 1983 to 1988.
Evidence: The team existed under various names from 1939 through 1993 and played in the New York–Penn League and its predecessor, the Pennsylvania–Ontario–New York League. Yuppi (1989-1993)
Yippee (1983-1988) The New York–Penn League (NYPL) was a Minor League Baseball league which operated in the northeastern United States from 1939 to 2020.