Tickets for UFC Fight Night, which airs live on FS1, go on sale on April 13.
Also battling it out in welterweight action will be Brad Scott and Salim Touahri.
Fresh from the biggest win of his career over Carlos Condit last December, Colorado’s Magny has also turned back the likes of Johny Hendricks, Kelvin Gastelum and Hector Lombard since his UFC debut in 2013. This May, he will put his ground game to the test against Iceland’s Nelson, who has ended six of his seven Octagon wins by submission.
Originally scheduled to face Jack Marshman at UFC London on March 17, Scott was left without an opponent when Marshman was pulled from the bout, but the former TUF Smashes finalist will make a quick turnaround to battle Poland’s Touahri, who is 5-1 in his last six.
For more fight card announcements, stay tuned to UFC.com.