Glanville played center field for the Indios de Mayagüez for two seasons. In his first season, he was named MVP of the Puerto Rico Winter League over Roberto Alomar.
In 1999, with the Philadelphia Phillies, Glanville batted .325 and hit 11 homers while driving in 73 runs, stole 34 bases,[7] and placed second in the National League (NL) behind Luis Gonzalez in hits with 204. He was registered double-digit outfield assists on three occasions during and ended his career going 293 consecutive games without a fielding error.[8] In the 11th inning of Game 3 of the 2003 NL Championship Series, he hit the game-winning triple for the Cubs.
In 2005, with no immediate prospects of joining an MLB roster, Glanville signed a one-day minor league contract with the Phillies, and then retired, saying he wanted to leave baseball wearing the uniform of the team that he grew up as a fan of, and to which he gave most of his playing career. He had 1,100 career hits.
After leaving baseball, Glanville served as managing partner for Metropolitan Development.[14]
Glanville is President of GK Alliance, LLC, a Glen Ellyn, Illinois-based company providing intellectual capital for start-up and emerging companies.[15] In his role with GK Alliance, he serves as Director, New Business Initiative for both James Romes Consulting[16] and MechTechnologies,[17] and President of Glanville-Koshul Homes.[18]
Since January 2008, Glanville has been writing for The New York Times. On May 9, 2009, Glanville wrote an op-ed article in The New York Times regarding his choice to not use steroids during his baseball days. The article compared the decision to Neo's choosing between blue and red pills in the movie The Matrix. Glanville wrote that thoughts of his mother kept him from abusing PEDs. In an online blog article of January 21, 2010, Glanville responded to Mark McGwire's admission that he used steroids.[19]
Glanville's book The Game From Where I Stand (ISBN0805091599) was published by Times Books in May 2010.[20]Buzz Bissinger called it "a book of uncommon grace and elegance...filled with insight and a certain kind of poetry."[21]
In April 2014, Glanville wrote an article in The Atlantic on a racial-profiling experience.[22]
^Philadelphia vs. New York Mets, USA Today, September 1, 2002. Accessed December 12, 2007. "'Playing in the rain today felt like playing on the ballfields at Teaneck,' said Glanville, who played at Teaneck High School in New Jersey."
^Doug Glanville (August 5, 2011). "Revisiting my Little League roots". ESPN. Retrieved January 18, 2021. I was part of a championship team in an undefeated season as a member of the Jets with my teammate, now Detroit Pistons head coach, Lawrence Frank.