PRE-QUESTION NOTE: Today is a Theme Day. Theme days can be overt, or they can be subtle and connected, in such a way that figuring out the theme may help you answer the questions. Good luck.

Give the most common nickname of the Brazilian athlete born Ricardo Izecson dos Santos Leite.

Give the most common nickname—which is actually now the legal name—of the Brazilian athlete born Maybyner Rodney Hilário.

Give the most common nickname of the retired athlete who won 17 grand slam doubles titles and two Olympic doubles gold medals, and is also the first Puerto Rican athlete to be inducted into the Tennis Hall of Fame.

Give the most common nickname of the American who finished seventh at the 2008 Olympics in the 100m hurdles (after clipping the ninth of ten hurdles), fourth at the 2012 Olympics in the 100m hurdles, and eleventh at the 2014 Olympics in four-woman bobsled.

Give the most common nickname of the youngest NFL player ever to reach 2,500 career receiving yards—a mark he reached in the 2019 season.