Sadaharu Oh
The 2000 Japan Series matched the Central League champion Yomiuri Giants against the Pacific League champion and defending Japan Series champion Fukuoka Daiei Hawks. The press called it the ON series because of the managers on both sides: Sadaharu Oh for the Hawks and Shigeo Nagashima for the Giants. The two were teammates in the 1960s and 1970s, and their combined hitting prowess gave them the nickname, "O-N Cannon."