The Las Vegas-based promotion announced the bouts on Tuesday evening. UFC 215 takes place at Rogers Place in Edmonton, Alberta, Canada, on Sept. 9 and is headlined by a flyweight title bout between Demetrious Johnson and Ray Borg.
Dos Anjos, the former lightweight champion, made a successful welterweight debut on June 17, when he captured a unanimous decision victory over Tarec Saffiedine at UFC Fight Night 111. That ended a two-fight skid for the 32-year-old Brazilian, who had dropped consecutive bouts to Tony Ferguson and Eddie Alvarez at 155 pounds.
Magny, meanwhile, has won four of his last five bouts, including a unanimous verdict over Johny Hendricks in his most recent outing at UFC 207. The Elevation Fight Team product also owns notable victories over Kelvin Gastelum and Hector Lombard during his promotional tenure.
Clarke has lost his last two Octagon appearances, falling to Joseph Duffy via first-round submission at UFC Fight Night 90 and Michael Chiesa via unanimous decision at UFC Fight Night 63. White has dropped three of his last four in the promotion, including a three-round decision defeat against Tony Martin at UFC Fight Night 103.