Major League Baseball maintained its grades for its racial and gender hiring practices, according to an annual report issued by Richard Lapchick's Institute for Diversity and Ethics in Sport at the University of Central Florida.

The league received an A grade in racial hiring and C in gender hiring.

The rosters on Opening Day featured 8.3 percent of players who identified as African-American, a slight increase from 8.2 percent last year, which equaled the study low set in 2007. It has not been 10 percent since 2002.

Managers identifying as a racial minority dropped 10 percentage points from 16.7 percent (five total) in 2014 to 6.7 (two) this year.

In April 2013, MLB instituted a task force to consider ways to increase diversity in the game, especially among African-American players.