Overview

• Knighton tested positive for trenbolone, a banned substance, during an out-of-competition test in March.
• The US Anti-Doping Agency provisionally suspended Knighton in April following the test results.
• An investigation concluded that the positive test was probably caused by contaminated meat from a Florida bakery.
• Knighton, known for his record-breaking 200m times, is now eligible to compete in the trials starting June 21 in Oregon.
• The World Anti-Doping Agency may still appeal the decision to the Court of Arbitration for Sport.