Violence in sports

FILE - In this May 30, 2018, file photo, then-San Francisco 49ers linebacker Reuben Foster walks on the field during a practice at the team's NFL football training facility in Santa Clara, Calif. Prosecutors in Florida have decided not to pursue a domestic violence charge against NFL player Reuben Foster more than a month after he was released from the San Francisco 49ers following his arrest. Prosecutors in Tampa filed a notice of termination of prosecution on Wednesday, Jan. 2, 2019. (AP Photo/Jeff Chiu, File)

FILE - In this Nov. 18, 2018, file photo, former Baltimore Ravens NFL football player Ray Rice stands on the Ravens sideline before a game between the Ravens and the Cincinnati Bengals, in Baltimore. Ray Rice says he’s not speaking out against domestic violence as a way to rejoin the NFL. Appearing Tuesday, Dec. 18, 2018, in a “CBS This Morning” interview with his wife, Janay, Rice said he sees similarities with himself after a video showed Kansas City Chiefs running back Kareem Hunt shoving and kicking a woman at a hotel last month. (AP Photo/Nick Wass, file)

FILE - In this Nov. 18, 2018, file photo, former Baltimore Ravens NFL football player Ray Rice stands on the Ravens sideline before a game between the Ravens and the Cincinnati Bengals, in Baltimore. Ray Rice says he’s not speaking out against domestic violence as a way to rejoin the NFL. Appearing Tuesday, Dec. 18, 2018, in a “CBS This Morning” interview with his wife, Janay, Rice said he sees similarities with himself after a video showed Kansas City Chiefs running back Kareem Hunt shoving and kicking a woman at a hotel last month. (AP Photo/Nick Wass, file)

Players of Argentina's River Plate celebrate with the trophy after beating Argentina's Boca Juniors in the Copa Libertadores final soccer match at the Santiago Bernabeu stadium in Madrid, Spain, Sunday, Dec. 9, 2018. (AP Photo/Manu Fernandez)

Argentina's River Plate players hold the trophy aloft as they celebrate their victory in the Copa Libertadores final soccer match at the Santiago Bernabeu stadium in Madrid, Spain, Monday, Dec. 10, 2018. (AP Photo/Thanassis Stavrakis)

Argentina's River Plate players hold the trophy aloft as they celebrate their victory in the Copa Libertadores final soccer match at the Santiago Bernabeu stadium in Madrid, Spain, Monday, Dec. 10, 2018. (AP Photo/Thanassis Stavrakis)

Firefighters try to extinguished a car set on fire by demonstrators during clashes with riot police, in Paris, France, Saturday, Dec. 8, 2018. Crowds of protesters angry at President Emmanuel Macron and France's high taxes tried to converge on the presidential palace Saturday, some scuffling with police firing tear gas, amid exceptional security measures aimed at preventing a repeat of last week's rioting. (AP Photo/Thibault Camus)

River Plate supporters cheer during a gathering at the Sol Square in Madrid, Saturday, Dec. 8, 2018. The Copa Libertadores Final between River Plate and Boca Juniors will be played on Dec. 9 in Madrid, Spain, at Real Madrid's stadium. (AP Photo/Andrea Comas)

A bin is burning as school children demonstrate in Paris, Friday Dec.7, 2018. Footage showing the brutal arrest of high school students protesting outside Paris is causing a stir ahead of further anti-government protests this weekend. (AP Photo/Thibault Camus)

In this Saturday, Nov. 24, 2018 photo, a River Plate soccer fan poses for a photo prior the final soccer match of the Copa Libertadores between River Plate and Boca Juniors in Buenos Aires, Argentina. The final match of the Copa Libertadores has been pushed back after the bus carrying the Boca Juniors players was attacked by fans as it drove to the Antonio Vespucio Liberti stadium. (AP Photo/Sebastian Pani)