Bedirhan Çetin was born on June 29, 2006, in Samsun. He began playing football in 2015 at Yenidoğanspor. He then played for Samsun Gençlik ve Spor Kulübü and transferred to the Samsunspor youth academy in 2020. Continuing his development there, the young center-back was promoted to Samsunspor’s first team in 2022.

He started his professional career on May 20, 2022, in a TFF 1. Lig match against Tuzlaspor. During the 2022–23 season, he was part of the squad as Samsunspor won the championship and was promoted to the Süper Lig. In May 2023, Bedirhan signed his first professional contract and has played in five official matches for the first team so far.

His national team career is also quite impressive. Starting from Turkey U16, he has played for the U17, U18, U19, and U20 teams. He has received numerous call-ups for UEFA tournaments and friendly matches. With his composure in defense and game intelligence, he has become a reliable figure both at club and national level.