Pierre Jean Arsenault (born October 12, 1963 in Roberval, Quebec) is a Canadian professional baseball scout for the Miami Marlins of Major League Baseball and a former longtime bullpen coach and coordinator.

[1] He was listed as a coach for 16 consecutive seasons for the Montreal Expos (1992–2001) and the Florida Marlins (2002–2007).

[2] As of 2013, he was serving as one of the Marlins' professional scouts, based in Pierrefonds, Quebec.

[3] As a Marlins coach, he was the first Quebecer to win the World Series in 2003.

He had previously been an assistant coach for the Québec Capitales of the Frontier League.