Jaroš' debut performance saw him draw high praise from his manager Stephen O'Donnell who stated "He’s shown tonight what he’s shown all pre-season. For a player so young, 19 years of age, to have such a good mentality and be so composed – if you were coming in and didn’t know his age, you’re saying: ‘That’s a seasoned veteran, that’s a real pro’." He kept the first clean sheet of his senior career on 3 April 2021, as his side won 1–0 away to Bohemians in the Dublin City derby at Dalymount Park to go top of the league.