Nathan Louis Bump (born July 24, 1976) is a Major League Baseball starting pitcher who currently plays for the Philadelphia Phillies organization and currently assigned to the Lehigh Valley IronPigs. He was drafted by the Giants in the 1998 Major League Baseball Draft as the 25th overall pick from Penn State University.He was traded in 1999 by the Giants with Jason Grilli in exchange for Liván Hernández from the Florida Marlins.