The son of businessman robert irsay (1923–1997), who acquired the baltimore colts in 1972 for $12 million and moved them to indianapolis in 1984, irsay was general manager of the colts from 1984 to 1996. · according to reporting from forbes, jims net worth was recently estimated to be $4. 8 billion. · jim irsay, colts owner, dies at 65 with $5. 8b net worth. What was jim irsays net worth? · james irsay is #751 on forbes 2025 billionaires list. Is jim irsay still alive? What did jim irsay buy? At the time of his death, forbes estimated his net worth at us$4. 8 billion. Inside his nfl legacy, addiction battle, and historic memorabilia empire. Jim irsay was an american businessman, philanthropist, and sports team owner who had a net worth of $5 billion at the time of his death. · here, well examine how jim irsay accumulated his fortune and net worth before his death. Jim inherited the colts from his father, robert irsay, who acquired the team in 1972.