The Washington Nationals have a President's Race during their games. The race debuted in 2006, and the four presidents on Mount Rushmore – George Washington ("George"), Thomas Jefferson ("Tom"), Abraham Lincoln ("Abe"), and Theodore Roosevelt ("Teddy") – have raced in every season since. In 2013, a fifth permanent contestant – William Howard Taft ("Bill") – was added. A sixth contestant was added in 2015 as part of a three-year marketing deal with the White House Historical Association, with the sixth slot changing annually based on the president featured by the association on its annual Christmas ornament. Calvin Coolidge ("Cal") was the first to fill the sixth slot, making his debut in July 2015. Herbert Hoover ("Herbie") replaced Coolidge for 2016. Each president has a uniform number corresponding to his place in the order in which they held the office (George – 1; Tom – 3; Abe – 16; Teddy – 26; William – 27; Cal – 30; Herbie – 31).