John Lowell McLaren (born September 29, 1951) is an American former professional baseball coach and manager. He is best known for his brief tenure as manager of the Seattle Mariners, from July 1, 2007 to June 19, 2008. A native of the Houston, Texas area, McLaren was a catcher in the Houston Astros minor league system from 1970 to 1976, and later managed in the Toronto Blue Jays minor league system.