Took a leave of absence from Penn in the spring of 1992 to play baseball, but returned in the fall to finish his course work and graduate. His senior engineering project was a transportation-feasibility study for a proposed baseball stadium on the site of the Philadelphia post office at 30th Street. Was drafted in the first round by the Chicago Cubs in 1991 and made his MLB debut with the club in June 1996. Led the league in stolen bases in 1999. One of his post-baseball jobs was working as a designer for a company in Chicago that built single-family homes. Authored the 2010 book The Game From Where I Stand.