Piotr Kotas was used internationally for the first time at the 2009 European Biathlon Championships in Ufa . In the individual, he finished 36th, was 43rd in the sprint, improved to 40th place in the pursuit race based on it and was on the side of Tomasz Puda , Mariusz Leja and Mirosław Kobus as the final runner with the relay of Poland 12.
Nationally, Kotas, who competes for AZS AWF Wrocław , won the silver medal at the Polish championships in Jakuszyce in 2007 as the starting runner of the relay with Krzysztof Pływaczyk , Mariusz Leja and Paweł Lasek behind the relay of BKS WP Kościelisko . In 2009 , a bronze medal was added in Wisła , which he won with Mateusz Steć, Leja and Mateusz Matusik.