Jaros made his Swedish Hockey League debut playing with Luleå HF during the 2014–15 SHL season.

[2] He made his NHL debut on 10 October, against Vancouver Canucks but spent the rest of the season with their American Hockey League (AHL) team, the Belleville Senators.

He appeared in 11 games for the Devils before he was placed on waivers and re-assigned to AHL affiliate, the Utica Comets, at the NHL trade deadline, on 21 March 2022.

After failing to report to the AHL, Jaroš was placed on unconditional waivers in order to mutually terminate the remainder of his contract with the Devils on 24 March.

[14] After a lone season with Severstal, Jaroš returned for a second stint with former club CSKA Moscow, in signing a one-year contract on 4 July 2024.