Dasha Kovalova obviously made history on Saturday by firing only the fourth televised perfect game in PWBA Tour history in the title match of the 2019 Pepsi PWBA Louisville Open at Executive Strike and Spare. Unmentioned in the telecast was that Kovalova apparently just missed an all-time PWBA record with top seed Liz Johnson. Bowling historian Eric Hartman said in a message that in the old PWBA Tour before it went defunct in 2003, the largest margin of victory in a telecast was 138 pins when...