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, to June 19, . 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. He became a major league coach with the Blue Jays in 1986 and has since held major league coaching positions with the Mariners, Boston Red Sox, Cincinnati Reds, Tampa Bay Devil Rays, and Washington Nationals. He also served as a coach for the United States national baseball team during the 2006 World Baseball Classic, spent two nonconsecutive seasons as a scout in the Devil Rays/Rays organization, and was interim manager of the Nationals for three games in 2011. He was employed as a professional scout for the Oakland Athletics organization from 2012 to 2015. He was the catching coach for the Philadelphia Phillies under manager Pete Mackanin for the 2016 season. Early life McLaren graduated from Westbury High School in Houston in 1970, and attended Blinn College, the University of St. Thomas and Houston Baptist University. Playing career McLaren, a catcher, was selected by the Houston Astros in the seventh round of the 1970 June MLB draft and was assigned to the rookie-level Covington Astros of the Appalachian League. He hit a home run in his first professional game on June 30. He led Western Carolinas League catchers in putouts and assists in 1971, and in 1973 at Columbus led Southern League catchers in fielding. His best offensive season came in 1975, when he batted .270 with 13 home runs and 57 runs batted in for the Iowa Oaks and Dubuque Packers. His playing career lasted through the 1976 season, having peaked at the triple-A level. Coaching and managing career In the 1979 season McLaren became manager of the Utica Blue Jays, a Toronto Blue Jays short-season single-A affiliate. He managed two other Blue Jays affiliates: the single-A Kinston Blue Jays from 1981–1982, and the double-A Knoxville Blue Jays from 1983–1985. McLaren entered MLB as the Blue Jays' third-base coach in . He coached for the Blue Jays through , then spent as bullpen coach for the Boston Red Sox before joining Lou Piniella's coaching staff with the Cincinnati Reds