GMAT or GRE?

<p>I am a senior in Math/Econ major thinking of going into Sports Management. I want to pursue MBA as soon as possible, but can people go straight into business school right after undergrad? Do undergrads take GMAT exams before they graduate? I've been working/interning part time since freshmen year so I have part time work experience in different sectors (IT, financial consulting, banking) but none related to sports management. </p>

<p>And can I take GRE instead of GMAT? Or would I have to take GMAT to stay competitive?</p>