Embarrassed to wear a cup for baseball?

Well, I'll be playing in a baseball team for a tournament, I'll be playing 2B/SS, I feel good playing at any of these positions.

However, I don't want to wear a cup! My girlfriend told me she'll come to see every game, and I'll be embarrassed that she will know that I need protection for my groin. I don't want her to think I'm not manly enough to play cup-less. I don't know if I should wear it or not.

What do you think?
Girls, would you care if your boyfriend wore one for baseball?
Embarrassed to wear a cup for baseball?
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