No, Brittney Griner is not a man. She is a woman and a well-known professional basketball player. Brittney Griner was born on October 18, 1990, in Houston, Texas, USA. She has played for various teams in the Women's National Basketball Association (WNBA) and is considered one of the most dominant players in women's basketball.
It's important to be cautious about spreading false information or rumors about individuals, including their gender identity. Misgendering someone, intentionally or unintentionally, can be hurtful and disrespectful. If you have any doubts about someone's gender identity, it's best to refer to them by the name and pronouns they use or to seek accurate information from reliable sources.