Ruddy attended The University of Notre Dame from 1990–1993. He was a four year letterman and two year starter during this time. He was selected as a second-team All-America and first-team All-Independent by The Football News and the Associated Press. Ruddy also posted a perfect 4.0 GPA his junior and senior years at Notre Dame. He graduated with 3.86 GPA. He holds a B.S. inmechanical engineering. He also earned post-graduate scholarships from the NCAA and the National Football Foundation.
Ruddy was the second-round draft choice (65th overall) of Miami in 1994. Ruddy started 140 games of his 156 games played in which 16 of those non starts were his rookie year but he saw time in all of them. During most of his career he was the center for Dan Marino, in 2001 Ruddy was named to the Pro Bowl. He was the first Miami center to be selected to the Pro Bowl since Hall of Fame center Dwight Stephenson in 1987.
Since retirement Tim has been a Director of Vista International Technologies, Inc. since October 2007.