Roy Halladay taught Cole Hamels more than just the game – NBC Sports Philadelphia
10 years later, Roy Halladay's perfect game lives on with Phillies, many others – The Morning Call
He Exemplified The Best': Cole Hamels Remembers Roy Halladay During Memorial Service
Cole Hamels honors former teammate Roy Halladay
Cole Hamels top career moments
Does Cole Hamels Know Cole Hamels?
A narrative timeline of Cole Hamels' Phillies career
Halladay, Hamels and Oswalt: Best Phillies Trio Ever?, by MLB.com/blogs
Former Star Pitcher Roy Halladay Dies in Plane Crash - Bloomberg
Roy Halladay elected to the Hall of Fame
Roy Halladay, Cliff Lee, & Cole Hamels Highlights
Roy Halladay, Former MLB Pitcher Killed in Small Plane Crash, Was New Pilot
Roy Halladay – Society for American Baseball Research
Roy Halladay, the quiet workaholic, left a loud and lasting mark in his relatively short time with the Phillies - The Athletic