Might not be 50, but it would have to be more than 30. Start with 30, assuming MLS keeps its 30 game schedule. If each team made the playoffs, they could each play 1 home game in the first round (if the playoffs stayed the same), but if they both made the second round, they'd have to play each other, so that could only be one game. So that's 3 playoff games. You'd have to figure they'd each play a friendly or two. Call it 3 friendlies a year between the two. You're up to 36. Nats (men and women) would probably play once a year there, each. That's 38. UCLA played there once last season, right? Figure they (or some other college team or teams) would play there once or twice a year? So it's probably not 50, but it's probably around 40. And if the Galaxy and Chivas USA shared the HDC, there would be a game on that field pretty much at least once (and sometimes twice) a week from April through November. It's not only the number of games, but the lack of recovery time for the field. I'm not a horticulturalist, so I don't know, but it would seem to me eventually the grass is going to show the effects. Whether it's manageable or not, I have no idea.