Violence in sports

Referee Deniz Aytekin, 2nd left, and his team stand on the pitch before the German Bundesliga soccer match between Borussia Dortmund and Schalke 04 in Dortmund, Germany, Saturday, May 16, 2020. The German Bundesliga becomes the world's first major soccer league to resume after a two-month suspension because of the coronavirus pandemic. (AP Photo/Martin Meissner, Pool)

FILE - In this April 29, 2015, file photo, Baltimore Orioles' Caleb Joseph connects for a single against the Chicago White Sox in Baltimore. Jeff Samardzija pitched for the White Sox in the game at Camden Yards closed to fans because of rioting in Baltimore prompted by the death of Freddie Gray, a 25-year-old black man who died in police custody. U.S. sports leaders are now weighing whether to bar fans from ballparks and stadiums to help stall the coronavirus outbreak. (AP Photo/Gail Burton, File)

FILE - At left, in a Jan. 30, 2019, file photo, New England Patriots' Rob Gronkowski speaks with members of the media during a news conference in Atlanta. At center, in an Aug. 24, 2019, file photo, Indianapolis Colts quarterback Andrew Luck speaks during a news conference following the team's NFL preseason football game against the Chicago Bears, in Indianapolis. At right, in an Aug. 2, 2019, file photo, Carolina Panthers' Luke Kuechly watches teammates warm up at training camp in Charlotte, N.C. Life in the NFL is short. The recent retirements of three of the game's best 30-and-under stars -- Gronkowski, Luck and Kuechly -- could be coincidence or the start of a worrisome trend. (AP Photo/File)

People set fires in garbage containers after a Catalan pro-independence protest outside the Camp Nou stadium ahead of a Spanish La Liga soccer match between Barcelona and Real Madrid in Barcelona, Spain, Wednesday, Dec. 18, 2019. Thousands of Catalan separatists are planning to protest around and inside Barcelona's Camp Nou Stadium during Wednesday's match against fierce rival Real Madrid. (AP Photo/Felipe Dana)

Real Madrid's Karim Benzema, left, and Barcelona's Gerard Pique walks together on the pitch during a Spanish La Liga soccer match between Barcelona and Real Madrid at Camp Nou stadium in Barcelona, Spain, Wednesday, Dec. 18, 2019. Thousands of Catalan separatists are planning to protest around and inside Barcelona's Camp Nou Stadium during Wednesday's "Clasico". (AP Photo/Bernat Armangue)

FILE - This June 28, 1997, file photo shows Mike Tyson biting into the ear of Evander Holyfield in the third round of their WBA heavyweight match in Las Vegas. Violence is part of the game in many sports. But when the Cleveland’s Myles Garrett ripped the helmet off Mason Rudolph and hit the Pittsburgh Steelers’ quarterback in the head with it, the Browns’ defender crossed a line _ one that attracts the attention of authorities sometimes from within their sport and in other cases from criminal prosecutors.(AP Photo/Jack Smith, File)

Cleveland Browns defensive end Myles Garrett walks off the field after he was ejected late in the fourth quarter of an NFL football game against the Pittsburgh Steelers, Thursday, Nov. 14, 2019, in Cleveland. The Browns won 21-7. (AP Photo/David Richard)