Today is Jackie Robinson day, a day commemorating Jackie Robinson's major league debut. On April 15th, 1947, Robinson became the first black major league baseball player. According to Google Trends, it appears interest in Robinson peaks two times a year: February and April, presumably corresponding with Black History Month and MLB's annual tradition of honoring Robinson.
Last week, in celebration of the start of the 2015 baseball season, I wrote a blog post for Contexts about the sociology of baseball. I invite you to check it out here.