But the 31-year-old claims one top player coming out would lead to others following their lead.
Talking on the BBC's Grounded with Louis Theroux podcast, Deeney said: "I would go on record saying that there is probably one gay or bi-person in every football team. They're there, they are 100 percent there. I think people that are gay or from that community definitely are very worried about having to shoulder the responsibility of being the first. I think once the first comes out, there would be loads".
Former Norwich and Nottingham Forest striker Justin Fashanu, who declared he was gay in 1990 and died in 1998, remains the only openly gay male footballer in British history.