Is it ok to do contact sport 1 year post op otoplasty?

Thanks for the question. After 6 weeks your surgery area is totally healed and yes you can do contact sports and also do other activities. I wish you all the best.

Yes, generally speaking, you should be cleared
to return to contact sports and to resume your normal lifestyle one year after
your otoplasty surgery. At this point, your recovery process should be nearly complete.
Still, it is essential that you get the official ok from the surgeon who
conducted your otoplasty. He or she knows your condition best and can advise
you accordingly. 

At one year post-op it should be okay to proceed with contact sports, but you will want to discuss this with your surgeon.  As with any contact sport, especially wrestling and MMA, there is a risk of auricular hematoma and cauliflower ear formation.  Involvement in such activities can ruin the cosmetic/reconstructive surgery that you went through (and paid for).