Periodicals include magazines, newspapers, and scholarly journals. Works cited entries for periodical sources include three main elementsâthe author of the article, the title of the article, and information about the magazine, newspaper, or journal.
While the percentage of black NFL players currently hovers around 70%, the corresponding percentage of black NFL coaches currently hovers around 6%.
Researchers there have now examined the brain tissue of 128 football players who, before their deaths, played the game professionally, semi-professionally, in college or in high school. Of that sample, 101 players, or just under 80 percent, tested positive for CTE. To be sure, players represented in the data represent a skewed population.