If you agree with the stat that 10% of the population is homo, then we can conclude that about 75 MLB players (three entire rosters) are homo.
I, personally, have the opinion, that the 10% estimation is too low as it pertains to the entire population. I have no empirical data to back this up, it is just my opinion. I went to Ohio University, I've lived in Columbus, and I've lived in Washington, DC (Georgetown, which, of course, is near DuPont Circle). All three of these locations have huge populations of smart successful homosexual people. The percentages in locations such as this might even approach 30 or 40 percent.
I am currently employed at Ohio Northern University (3300 students) in Ada, Ohio (pop. 5000). Every single day, I see a good number of gay people (professors, students and other employees). Even in the rural Midwest flatlands, the percentage of gays is well over 10%.
Getting back to the topic, I will just say that there have been gays in pro sports for as long as there have been pro sports. Some of them (Eric Dickerson, for example) enjoyed long successful careers. I do not understand why it has become such a hot topic.