FILE - In this Dec. 24, 2011, file photo, Pittsburgh Steelers linebacker LaMarr Woodley watches warm ups before an NFL football game against the St. Louis Rams in Pittsburgh. In recent interviews with 40 players _ 13 rookies, 17 active veterans and 10 former NFL players _ The Associated Press heard growing worry about the physical and emotional toll professional football takes. The 43-year old former NFL linebacker Junior Seau's suicide at his oceanfront home on May 2, 2012, resonated across the age groups, with more than half of each saying that particular event pushed them to ponder their future in the sport or the difficulties of adjusting to a new daily life after leaving the league. (AP Photo/Gene J. Puskar, File)

Former astronaut Buzz Aldrin smiles as he walks along the sidelines at the start of the NFL football game between Pittsburgh Steelers and St. Louis Rams on Saturday, Dec. 24, 2011 in Pittsburgh. (AP Photo/Keith Srakocic)