8 teeth sacrificed for the record

Articles continued:

This ends any stunts for seals, Charley Graham says. San Francisco Examiner. August 4, 1939.

Websites:

Charley Graham. Wikipedia website. http://en.wikipedia.org/wiki/Charlie_Graham. Accessed November 20, 2013.

Golden Gate International Exhibition. Wikipedia website. http://en.wikipedia.org/wiki/Golden_Gate_International_Exposition. Accessed November 20, 2013.

Joe Sprinz. Wikipedia website. http://en.wikipedia.org/wiki/Joe_Sprinz. Accessed November 20, 2013.

Lefty O'Doul. Wikipedia website. http://en.wikipedia.org/wiki/Lefty_O%27Doul. Accessed November 20, 2013.

Pacific Coast League. Wikipedia website. http://en.wikipedia.org/wiki/Pacific_Coast_League. Accessed November 20, 2013.

Who caught the highest pop up ever? Modern Spectator. Accessed November 21, 2013.

Zack Hample's helicopter drop catch. Yahoo Sport's Minute. Accessed November 20, 2013.

Email correspondence:

Sarah Wilcox, Guinness Book of World Records, February 6, 2012.