Male groin pain after sports?
Hmm... because it's reoccurring and you say it's a sharp pain, I would think you should go to a doctor and get an MRI if that is what he recommends. However, because you say it goes away when you 'warm up' and also because it does go away for some time without any rest from physical activity (I'm assuming). It may not be serious at all though. If going to the doctor and getting an MRI is an issue for you, maybe you can try taking a break from physical activities for two weeks and see if it helps. Put ice on the area often and take anti-inflammatory medicine if you need to.
Pull back on your physical or athletic stuff And find a activity level that your body can Handle. Listen to your body when it sends Pain or fatigue or other warnings. Taking Care of your body should out weigh any Sports agendas or goals or competition Bs.