lucky number in Japan. The design, dubbed the "Eagle Rainbow", was drastically different from the team's previous uniforms. The jersey was the team's only v-neck pullover and was white and crimson with seven different shades of red, orange, and yellow. The chest bore the word "Eagles" in a simple dark blue font with a logo illustration of an eagle underneath. The cap emblem was also changed to feature the same "E" as on the chest. The uniforms were worn during four interleague games that season, and the player-worn jerseys were auctioned off to raise money for earthquake relief. The team has worn a special summer uniform every season since, and next season Rakuten unveiled the "Eagle Star" uniform, which added crimson, full-body pinstripes to the home design. The "Tohoku Green" theme was introduced in 2013 and variations of the same uniform was used for three seasons. To bring attention to the conservation of Tōhoku's forests, the jerseys were green and displayed "Tohoku" across the chest. Full-body crimson pinstripes were brought back in 2016, this time extending to the cap as well. These "Eagle Summer" uniforms also displayed "Rakuten" on the chest. The next two seasons featured black jerseys and caps. The first, "Black Eagles" in 2017, was a black version of the home uniforms. The following year, the "Tōhoku Pride" uniform was a black version of that year's Fans' uniform. The current special uniform theme is "Tohoku Blue", a companion to the green theme. First introduced in 2019, the jersey design was similar to the previous year's, however it was blue to represent the sky. The colors were modified for the following season when it changed to white with blue pinstripes. As with the Fans' uniform, 2020's Tohoku Blue uniforms are returning for 2021. Mascots At the time of team's inception, Rakuten created a pair of male and female golden eagle mascots. Named Clutch and Clutchena respectively, the names were chosen from suggestions from the public and are derived from the clutch of an eagle's claw as well as the baseball concept of a clutch hitter. Clutch wears a jersey bearing the number 10, an Eagles retired number that represents the fans. A third mascot, a harpy eagle named Switch, was unveiled in 2016. The Eagles have also periodically featured an unofficial, mischievous mascot named Mr. Carrasco. The character, based on a black crow, is masked and rides a motorcycle.