Koji Nagai (Japanese: 永井 浩二, Hepburn: Nagai Kōji; born June 2, 1971) is a Japanese professional baseball coach and former catcher, noted for coaching as a bullpen catcher for the New York Mets of Major League Baseball (MLB). Nagai currently serves as head coach for the OISCA Hamatsu Kokusai High School (オイスカ浜松国際高等学校) student baseball team.
Source: “Koji Nagai (baseball)”, English Wikipedia (CC BY-SA 4.0), excerpt
