This page reproduces publicly reported regulatory and medical-administrative records. Every entry names the body that issued it. Anti-doping testing entries are counts of publicly reported test sessions and are not pass/fail results — a test session is not a positive test. Records are reproduced as published and are not medical advice.
0Anti-doping sanctions
0Medical suspensions
1Injury records
11Testing entries
Injury / withdrawal (1)
Injury withdrawal
Injury / withdrawal
Days after Stephen Thompson was forced to withdraw from UFC 154, his original opponent, Besam Yousef , has also been injured. Thompson's replacement, Matt Riddle, has now verbally agreed to meet the UK's "gypsy jiu-jitsu" specialist John Maguire in the all-new welterweight bout set for Montreal. Riddle Replaces Thompson at UFC 154
Date
31 October 2012
Status
Withdrew due to verified injury
Injury
Injury (details not disclosed)
Timing
Before scheduled fight
Event
Pair of Injuries Forces All-New UFC 154 Bout
Next fight
25 May 2013 vs Nah-shon Burrell
Days to next fight
206
Issuing body
Ultimate Fighting Championship
Issued by: Ultimate Fighting Championship
Anti-doping testing activity (11)
2026 UFC ADP testing activity
Anti-doping testing activity
3 publicly reported test sessions in 2026. This count is not a pass/fail result.
Date
2026
Status
Testing activity
Test sessions reported
3
Issuing body
UFC Anti-Doping Program / CSAD
Issued by: UFC Anti-Doping Program / CSAD
2025 UFC ADP testing activity
Anti-doping testing activity
5 publicly reported test sessions in 2025. This count is not a pass/fail result.
Date
2025
Status
Testing activity
Test sessions reported
5
Issuing body
UFC Anti-Doping Program / CSAD
Issued by: UFC Anti-Doping Program / CSAD
2024 UFC ADP testing activity
Anti-doping testing activity
4 publicly reported test sessions in 2024. This count is not a pass/fail result.
Date
2024
Status
Testing activity
Test sessions reported
4
Issuing body
UFC Anti-Doping Program / CSAD
Issued by: UFC Anti-Doping Program / CSAD
2023 UFC ADP testing activity
Anti-doping testing activity
9 publicly reported test sessions in 2023. This count is not a pass/fail result.
Date
2023
Status
Testing activity
Test sessions reported
9
Issuing body
UFC Anti-Doping Program / CSAD
Issued by: UFC Anti-Doping Program / CSAD
2022 UFC ADP testing activity
Anti-doping testing activity
5 publicly reported test sessions in 2022. This count is not a pass/fail result.
Date
2022
Status
Testing activity
Test sessions reported
5
Issuing body
UFC Anti-Doping Program / CSAD
Issued by: UFC Anti-Doping Program / CSAD
2021 UFC ADP testing activity
Anti-doping testing activity
5 publicly reported test sessions in 2021. This count is not a pass/fail result.
Date
2021
Status
Testing activity
Test sessions reported
5
Issuing body
UFC Anti-Doping Program / CSAD
Issued by: UFC Anti-Doping Program / CSAD
2020 UFC ADP testing activity
Anti-doping testing activity
6 publicly reported test sessions in 2020. This count is not a pass/fail result.
Date
2020
Status
Testing activity
Test sessions reported
6
Issuing body
UFC Anti-Doping Program / CSAD
Issued by: UFC Anti-Doping Program / CSAD
2019 UFC ADP testing activity
Anti-doping testing activity
9 publicly reported test sessions in 2019. This count is not a pass/fail result.
Date
2019
Status
Testing activity
Test sessions reported
9
Issuing body
UFC Anti-Doping Program / CSAD
Issued by: UFC Anti-Doping Program / CSAD
2018 UFC ADP testing activity
Anti-doping testing activity
5 publicly reported test sessions in 2018. This count is not a pass/fail result.
Date
2018
Status
Testing activity
Test sessions reported
5
Issuing body
UFC Anti-Doping Program / CSAD
Issued by: UFC Anti-Doping Program / CSAD
2017 UFC ADP testing activity
Anti-doping testing activity
7 publicly reported test sessions in 2017. This count is not a pass/fail result.
Date
2017
Status
Testing activity
Test sessions reported
7
Issuing body
UFC Anti-Doping Program / CSAD
Issued by: UFC Anti-Doping Program / CSAD
2016 UFC ADP testing activity
Anti-doping testing activity
8 publicly reported test sessions in 2016. This count is not a pass/fail result.