The brain of former NFL star Junior Seau, who committed suicide last year, showed signs of the kind of neurodegenerative disease associated with repetitive head trauma. Elsa/Getty Images hide caption

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Junior Seau, seen here playing for the New England Patriots toward the end of his career, suffered from a degenerative brain disease, scientists say. Otto Greule Jr./Getty Images hide caption

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Junior Seau, seen here playing for the New England Patriots toward the end of his career, suffered from a degenerative brain disease, scientists say. Otto Greule Jr./Getty Images hide caption

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Andy Reid as he left the field Sunday in New Jersey. His last game as head coach of the Philadelphia Eagles was a 42-7 loss to the New York Giants. Elsa/Getty Images hide caption

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They'll be welcomed back by fans: Regular NFL refs will be on the job again starting tonight. (2006 file photo.) Shaun Best/Reuters /Landov hide caption

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A spoof site launched by Erik Johnson pretends to offer Google's search engine — if it were run by replacements. Replacement Google hide caption

itoggle caption Replacement Google

Things haven't been going well for these guys: Some of the NFL's replacement referees, during a Sept. 23 game between the New England Patriots and Baltimore Ravens. Kevin Dietsch /UPI /Landov hide caption

itoggle caption Kevin Dietsch /UPI /Landov

Confusion: One official (to the left) signals touchdown for Seattle. The other signals that a touchback — possession — for Green Bay. Stephen Brashear/AP hide caption

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Denver Broncos Coach John Fox yells at field judge Jimmy Buchanan during the Broncos' game against Atlanta Monday. Referring to the game, the NFL insisted that players and coaches give replacement referees, and the game, more respect. Kevin C. Cox/Getty Images hide caption

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Denver Broncos Coach John Fox yells at field judge Jimmy Buchanan during the Broncos' game against Atlanta Monday. Referring to the game, the NFL insisted that players and coaches give replacement referees, and the game, more respect. Kevin C. Cox/Getty Images hide caption

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Art Modell, then the owner of the Baltimore Ravens, with the Vince Lombardi Trophy after his team beat the New York Giants in the January 2001 Super Bowl. Jeff Haynes /AFP/Getty Images hide caption

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