North Baltimore Aquatic Club Rebecca Wilke Mann (born November 26, 1997) is an American open water swimmer and writer.

[3] In 2011, Mann qualified for the Olympic Trials for open water and pool swimming, one of the youngest swimmers to do so.

[5][6][7][8] She swam for University of Southern California for two years before going pro, when she returned to training under Bowman at Sun Devil Aquatics.

[16] She competed at the 2012 FINA Swimming World Cup, winning gold in the 800 meter freestyle at the Berlin stop.

[1][21][22] Mann competed in the 2016 Olympic Trials, but performed poorly due to suffering herniated disks and overtraining shortly before the competition.