Dawson earned a callup to the UFC after submitting Adrian Diaz during the Dana White Contender Series 6 (DWCS) this summer.
The UFC released a statement on its website:
The UFC organization was notified today that the U.S. Anti-Doping Agency (USADA) has informed Grant Dawson of a potential Anti-Doping Policy violation stemming from an out-of-competition sample collected on October 18, 2017.
USADA, the independent administrator of the UFC Anti-Doping Policy, will handle the results management and appropriate adjudication of this case involving Dawson. Under the UFC Anti-Doping Policy, there is a full and fair legal process that is afforded to all athletes before any sanctions are imposed. Additional information will be provided at the appropriate time as the process moves forward.
The process continues for Dawson.