New Zealand falls in a surprise upset following rugby's return to the Olympic Games after a 92-year absence, America's oldest Olympian wins bronze in equestrian and Kenyan police arrest their country's Olympic track and field manager for accepting a bribe as the Rio Olympics continue.
Here are some notable figures from Day 4:
21: The number of gold medals U.S. swimmer Michael Phelps has won. Phelps added to his count twice on Tuesday: once in the 200-meter butterfly and again in the 4 by 200-meter freestyle relay.
15: The number of gold medals to be awarded on Tuesday. The competitions include four big battles in the pool and the ever-dazzling women's team gymnastics title.
1st: Nate Ebner made Olympic history as the first active NFL player to compete at the Summer Olympics. Ebner, who helped the New England Patriots with Superbowl XLIX, stepped onto the pitch for USA rugby for the first time during the second half of the match against Argentina Monday afternoon. USA lost 17-14 in the first rugby match of the Olympics in 92 years.
1st: Hungarian-born Szandra Szogedi made history when she stepped onto the judo mat at the Rio de Janeiro Olympics on Tuesday. Except that it was for Ghana. Szogedi became the first-ever female judoka to represent the African nation, after obtaining Ghanaian citizenship through her husband.
12: The number of world series championships New Zealand has won in rugby, leading them to be considered medal favorites in the competition before falling in an upset to Japan Tuesday 14-12.
23rd: China's Lijia Xu current standing after being disqualified from her fourth-place finish in the second race Monday. The defending gold medalist in the Laser Radial class in the Olympic sailing regatta has some serious ground to makeup if she hopes to win gold again.
Acting on a protest by Paige Railey of the United States, the jury determined that Xu performed her penalty turn too late after she fouled Railey approaching the windward mark.
52: The age of America's oldest Olympian Phillip Dutton this year, who's won bronze Tuesda in the equestrian event. Dutton stood in 4th place heading into Tuesday's final jumping phase and finished strong to bring home a medal.
13,000: The amount of the bribe Kenyan police say the country's Olympic track and field manager accepted leading to his arrest. Michael Rotich was ordered to return home from the Olympics in Brazil after he was caught in a sting by reporters from Britain's The Sunday Times newspaper. The paper said Rotich offered to provide the reporters, who were posing as coaches, advance warning of doping tests in return for a 10,000-pound ($13,000) bribe.
5: The Final Five, the nickname adopted by the gold-medal-winning U.S. Women's Gynmastics team, in recognition of the smaller teams that will travel to Tokyo in 2020. Future teams will be made up of four members. The U.S. women, led by Simone Biles, won the second consecutive gold medal for the team, and the third overall. They were ahead of the second-place Russians by a record 8.209 points.