FILE - In this Sept. 14, 2008, file photo, Cincinnati Bengals starting tight end Ben Utecht is taken off the field during an NFL football game against the Tennessee Titans in Cincinnati. There are times when Utecht is with friends talking about old times _ a wedding, perhaps _ and the former NFL tight end can't remember any of it, even after they drag out the photographs to prove it. He had to retire after his fifth concussion and is still feeling the effects.

FILE - In this July 28, 2008, file photo, Cincinnati Bengals tight end Ben Utecht looks on during NFL football practice in Georgetown, Ky. There are times when Utecht is with friends talking about old times _ a wedding, perhaps _ and the former NFL tight end can't remember any of it, even after they drag out the photographs to prove it. He had to retire after his fifth concussion and is still feeling the effects.

FILE - In this May 11, 2012, file photo, Cincinnati Bengals wide receiver Mohamed Sanu (12) catches a pass during practice at the NFL football team's rookie camp in Cincinnati. 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 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.

FILE - In this Jan. 7, 2012, file photo, Houston Texans wide receiver Andre Johnson (80) leaves the field after winning an NFL wild card playoff football game against the Cincinnati Bengals in Houston. Johnson said Monday, May 21, that he will be out for three to four weeks after arthroscopic surgery on his left knee.

Houston Texans wide receiver Andre Johnson on the field before an NFL wild card playoff football game against the Cincinnati Bengals Saturday, Jan. 7, 2012, in Houston.

CINCINNATI, OH - MAY 12: Dre Kirkpatrick #27 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Dre Kirkpatrick #27 of the Cincinnati Bengals looks on during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Dre Kirkpatrick #27 of the Cincinnati Bengals talks with coach Hue Jackson during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Dre Kirkpatrick #27 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: George Iloka #43 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Vontaze Burfict #55 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Marvin Jones #82 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Kevin Zeitler #68 of the Cincinnati Bengals stretches during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Marvin Jones #82 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Kevin Zeitler #68 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Orson Charles #80 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Vontaze Burfict #55 of the Cincinnati Bengals listens with other linebackers during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Dan Herron #34 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Taveon Rogers #89 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Cincinnati Bengals head coach Marvin Lewis looks on during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Cincinnati Bengals tight ends coach Jonathan Hayes watches the blocking of Orson Charles #80 during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Mohamed Sanu #12 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 12: Rodney Stewart #37 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 12, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 11: Dre Kirkpatrick #27 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 11, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 11: Kevin Zeitler #68 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 11, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 11: Head coach Marvin Lewis of the Cincinnati Bengals talks to players during a rookie minicamp at Paul Brown Stadium on May 11, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 11: Tony Pike #5 of the Cincinnati Bengals grabs a drink of water during a rookie minicamp at Paul Brown Stadium on May 11, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 11: Vontaze Burfict #55 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 11, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 11: Orson Charles #80 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 11, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)

CINCINNATI, OH - MAY 11: Brandon Thompson #79 of the Cincinnati Bengals works out during a rookie minicamp at Paul Brown Stadium on May 11, 2012 in Cincinnati, Ohio. (Photo by Joe Robbins/Getty Images)