Paul John Quantrill (born November 3, 1968) is a Canadian former professional baseball right-handed relief pitcher.

Originally considered a starter, Quantrill eventually found consistency as a reliever after several years of splitting time between the bullpen and the starting rotation for several teams.

While playing in the 2006 World Baseball Classic, Quantrill announced that he would retire at the end of the event.

On June 19, 2010, Quantrill was inducted, along with former Blue Jay Roberto Alomar, into the Canadian Baseball Hall of Fame in St. Marys, Ontario.

[5][6][7] As of June 2016[update], Quantrill serves as a special assistant to the Toronto Blue Jays organization.