![empty pool with lanes](https://www.usada.org/wp-content/uploads/swimming_post2.jpg)
AAA Arbitrator Imposes Public Warning for U.S. Swimming Athlete, Tierney, for Rule Violation
[…] Missouri, and has determined that Tierney should receive a public warning for his rule violation. Tierney, 23, declared the use of an inhaler containing the prohibited substance Vilanterol Trifenatate, during an in-competition test on June, 3, 2016. Tierney was using the inhaler under the care of a medical professional, but did not check to […]