Muhammad Ali, world heavyweight boxing champion, stands with Malcolm X (left) outside the Trans-Lux Newsreel Theater in New York in 1964. AP hide caption
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Indianapolis Colts quarterback Peyton Manning meets with Carolina Panthers quarterback Cam Newton after an NFL game in Indianapolis in 2011. Manning and Newton will square off in the 50th Super Bowl, in Santa Clara, Calif., on Sunday. The two quarterbacks were No. 1 overall draft picks 13 years apart. AJ Mast/AP hide caption
Fans cheer for the future Los Angeles Rams NFL team, during a news conference at the Forum in Inglewood, Calif., last Friday. The Rams are returning from St. Louis in 2016 to play in the Los Angeles area. Nick Ut/AP hide caption
Futbol Club Barcelona's Neymar da Silva Santos pours champagne over Adriano as their team won the final match against River Plate at the FIFA Club World Cup soccer tournament in Yokohama, near Tokyo, on Dec. 20. Shuji Kajiyama/AP hide caption
Bribes paid by runner Liliya Shobukhova are at the center of an ethics inquiry, according to the IAAF, track and field's governing body. Ben Stansall/AFP/Getty Images hide caption
Fans of the Memphis Grizzlies, seen here celebrating with Jeff Green, made only 2.47 grammar mistakes for every 100 words according to a new study. Frederick Breedon/Getty Images hide caption
Former Cincinnati Reds player and manager Pete Rose has been banned from the game since 1989. But he could be reinstated. Gary Landers/AP hide caption
Olympic team members stand on the field as the Olympic flag flies at half-staff during a memorial service in the Munich Olympic Stadium in Germany on Sept. 6, 1972. Eleven Israeli team members were killed by Arab guerrillas at the Summer Olympic Games. A crowd of 80,000 filled the stadium to capacity. AP hide caption
Russia's Mariya Savinova won gold in the 800-meter final at the 2012 Olympics in London. A new report ruled that she should never should have competed because her drug test profile showed she was doping. Matt Dunham/AP hide caption
The Alto Yellowjackets take the field on Nov. 13, a month after Matthews died. Lauren Silverman/NPR hide caption
Deaths Persist In Youth And Student Football Despite Safety Efforts
Charlotte Hornets' Jeremy Lindrives past Sacramento Kings' Omri Casspi in the second half of a game on Nov. 23. The Hornets won 127-122 in overtime. The Kings haven't won a championship since 1951. Chuck Burton/AP hide caption
For Thursday night's game, the New York Jets and Buffalo Bills wore solid colors — green and red, respectively — that were created by Nike. Many colorblind fans were not happy with the pairing. Al Bello/Getty Images hide caption
Kansas City Chiefs outside linebacker Justin Houston (second from left) shakes hands with Detroit Lions wide receiver Calvin Johnson after the NFL football game between the Lions and Chiefs at Wembley Stadium in London on Nov. 1. Matt Dunham/AP hide caption