Osaze Tafari De Rosario (/oʊˈsɑːzeɪ/ oh-SAH-zay; born 19 July 2001) is a professional footballer who plays as a striker for MLS Next Pro club Tacoma Defiance.

[3][4] He departed NYCFC after 2020, and in early 2021 went on trial with Spanish clubs UD San Sebastián de los Reyes[5] and CD Lugo.

[6][7] In 2018, he played with Toronto FC III in the Canadian third-tier League1 Ontario,[8] making his debut on August 19 against Ottawa South United.

[9] In September 2021, after a successful trial, De Rosario signed a three-year contract with Ukrainian Premier League club Rukh Lviv,[10] and was assigned to the reserves.

[14] After leaving Ukraine, De Rosario joined Canadian Premier League club York United on trial during their pre-season in March 2022.

[35] De Rosario was eligible to represent the United States (his country of birth), Canada (through his parents) and Guyana (through his paternal grandparents).