Pro Football Hall of Fame President David Baker (in blue jacket) inspects the turf at Tom Benson Hall of Fame Stadium after an NFL preseason football game between the Green Bay Packers and the Indianapolis Colts was canceled due to poor field conditions. Gene J. Puskar/AP hide caption

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Dave Pear of the Oakland Raiders puts a stop to Larry Csonka of the Miami Dolphins after a 1-yard gain during fourth-quarter action on Oct. 9, 1979, in Oakland. The Raiders won 13-3. AP hide caption

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What Is Football Doing To Us As A People?

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Kevin Turner was a lead plaintiff in the class-action lawsuit against the NFL that was affirmed Monday. Turner died last month; he's seen here in a 2014 Senate hearing on the long-term effects of brain injuries. Charles Dharapak/AP hide caption

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Nigel Bradham of the Buffalo Bills celebrates a touchdown in the October game against Jacksonville Jaguars in London. Yahoo's online stream of the event was one of the NFL's digital tests. Alan Crowhurst/Getty Images hide caption

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Before Monday, no NFL official had publicly acknowledged a link between football and chronic traumatic encephalopathy. Here, members of the Denver Broncos are seen after one of their teammates suffered a concussion during a game in late 2014. Doug Pensinger/Getty Images hide caption

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In A First, NFL Executive Admits Football Is Linked To Brain Damage

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NFL Commissioner Roger Goodell holds a press conference on October 8, 2014 in New York City. Andrew Burton/Getty Images hide caption

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A Year On, Did NFL Anti-Domestic Violence Efforts Work?

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Delvin Breaux, during a game against the New York Giants in November 2015. Sean Gardner/Getty Images hide caption

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Even A Broken Neck Couldn't Bury His Dream

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Minnesota Vikings quarterback Teddy Bridgewater lies unconscious after sustaining a particularly nasty hit to the head during a game against the St. Louis Rams in 2015. The NFL reports there were 271 diagnosed concussions last year. Jeff Haynes/AP hide caption

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New England Patriots' defensive end Chandler Jones holds a Microsoft Surface tablet on the sideline in the third quarter of the AFC Championship game against the Denver Broncos. In the second quarter, the Patriots' tablets briefly stopped working. Christian Petersen/Getty Images hide caption

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Cam Newton celebrates after a touchdown against the Arizona Cardinals, on Sunday in Charlotte, N.C. Grant Halverson/Stringer / Getty Images hide caption

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