Carls John de Tomas has accepted a one-year suspension for an anti-doping violation stemming from an in-competition sample in relation to UFC Fight Night 123.

USADA announced the sanction in a statement on Monday:

De Tomas, 21, tested positive for furosemide, stemming from a urine sample he provided during the in-competition period on December 8, 2017, before his bout at the UFC Fight Night event in Fresno, Calif. Furosemide is a Specified Substance in the class of Diuretics and Masking Agents and prohibited at all times under the UFC Anti-Doping Policy, which has adopted the World Anti-Doping Agency Prohibited List.

De Tomas’ one-year period of ineligibility began on December 29, 2017, the date his provisional suspension was imposed. The athlete’s positive test also falls under the jurisdiction of the California State Athletic Commission, which has also sanctioned De Tomas with a one-year suspension and a $2,500 fine.

De Tomas tapped to an anaconda choke from Alex Perez 1:54 into the second round of their preliminary bout at UFC Fight Night 123 on Dec. 9 at the Save Mart Center in Fresno, Calif. The 21-year-old Filipino fighter debuted in the Octagon at UFC Fight Night 111 on June 17, losing a unanimous decision to Naoki Inoue. “Golden Boy” began his professional career with six straight triumphs before joining the Las Vegas-based promotion.