playing for the same team

Gay. If someone (of the opposite sex) is playing for the same team as you, it means they are also after the the same sex (love interest-wise) as you.

Tyrone: Ayo, man. I like Gina, you think you could hook a nigga up?
Jamal: Nah, nigga, she’s playing for the same team as us.
Tyrone: Damn, she’s gay?!
Jamal: Yeah, nigga. She after them girls too.