Conversation so far:
What were Tim Russert's favorite sports?
Tim Russert's favorite sports were baseball, football, and hockey
What sport did Tim Russert broadcast?
Russert didn't broadcast sports, but at the end of his political broadcasts he talked about his support for the Buffalo Bills football team
How many children did Tim Russert have?
Tim Russert had one son
Was Tim Russert married?
Tim Russert was married to Maureen Orth

Question: How old was his son?
Self-contained rewrite: How old was Tim Russert's son?