Philip Trent Jewett (born 3 March 1964 Dallas, Texas) is an American baseball coach and former minor league baseball player. He is currently third-base coach for the Washington Nationals, replacing Bo Porter, who became Manager of the Houston Astros. He was the Nationals first-base coach since mid-2010. He was the manager of the Triple-A Indianapolis Indians, the top farm club of the Pittsburgh Pirates of Major League Baseball from 2005 to 2008.

He managed the Triple-A Nashville Sounds from 1998 to 2000 and 2003 to 2004. From 2000 to 2002 he was Pittsburgh's third base coach. After spending 2009 as the manager of the Washington Nationals' High A affiliate in Potomac, he was named 2010 manager of the Syracuse Chiefs, Washington's Triple A affiliate.

Jewett spent four seasons in the Pirates farm system as a catcher. For his career he had a .172 batting average with two HR and 26 RBI in 113 career games.

Jewett graduated from R.L. Turner High School, Carrollton, Texas, in 1982, and went on to the University of North Texas where he majored in business and played on the baseball team as catcher. He earned a Bachelor of Business Administration in 1988.