Sorin Cătălin Frunză (born 29 March 1978) is a Romanian professional footballer who plays as a left midfielder for Liga IV side Avântul Valea Mărului. Frunză began his career at Dunărea Galați. After one year spent at Cimentul Fieni and Politehnica Timişoara and two one-year spells at Dacia Unirea Brăila and Jiul Petroşani, Frunză moved in 2002 to newly founded Vaslui, and spent two seasons at the club before a transfer to Universitatea Craiova in the Romanian first division. However, following a dispute between Vaslui and Craiova over $50,000 that the former was to receive from the latter, Frunză returned to Vaslui after only six months. He was appointed team captain and helped Vaslui to gain a historical promotion in Divizia A, after only three years since the club foundation.