'Game of Thrones' creator and sports fan George R.R. Martin compares his popular series to the NFL.

Martin was asked how he became a sports fan.

"A lot of that dates to our childhoods, when the world divides us into jocks and nerds," said Martin. "But there are always the nerds who, though not jocks, are still into sports. Believe it or not, I worked four summers in college as a sports writer covering baseball for a parks and rec department in Bayonne, N.J."

Martin receives invitations to play fantasy football, but remains committed to his day job.

"I do get invitations all of the time to play actual fantasy football, by the way, but I get the feeling that I'd like it too much. I have enough demands on my time. My fans would kill me."