won't have to swim naked when he returns to the pool this summer ... 'cause the troubled Olympian finally has a new swimsuit sponsor -- TYR.
The 12-time Olympic medalist was sacked by Speedo -- along with Polo Ralph Lauren and Gentle Hair Removal -- in August after his Rio gas station robbery incident.
"Through his work in the pool he has elevated the sport of swimming on a global scale," Matt DiLorenzo, CEO of TYR Sport says.
"However, it is his humble and caring approach toward his fans that has proven truly commendable.