The Reds transferred Martini (thumb) from the 10-day injured list to the 60-day IL on Saturday.
Martini underwent thumb surgery earlier in the week, and Reds manager David Bell said at the time that the 34-year-old would be out until at least September. His move to the 60-day IL confirms as much, as Martini isn't eligible to be activated until Sept. 6. The move also frees up a spot on Cincinnati's 40-man roster for right-hander Tony Santillan, whose contract was selected from Triple-A Louisville.