Shahrdari Gorgan won the title of the Iranian Basketball Super League (IBSL) for the first-time ever last season and is going to defend its title in the current season.
Shahrdari Gorgan has advanced to the 2021-22 IBSL playoffs.
The team is scheduled to play Exxon Tehran on Tuesday.
Haddadi is the first Iranian to play in the National Basketball Association (NBA) when he debuted with the Memphis Grizzlies in 2008.