Career
After playing college basketball for Chipola College, University of Oregon and Wichita State University Armstead entered the 2013 National Basketball Association draft but was not selected in the draft"s two rounds. After going undrafted in the 2013 National Basketball Association Draft, Armstead signed his first professional contract in August 2013, with the Slovenian Basket League"s Krka Novo Mesto for the 2013-2014 season. On June 23, 2014 he re-signed with the club for the 2014-2015 season.
On June 10, 2015, he signed with Avtodor Saratov of Russia for the 2014-2015 season.
On November 16, 2015, he left the club in order to sign witn the Greek club AEK Athens for the rest of the 2015-2016 Greek Basket League season. On December 25, 2015, he parted ways with AEK, and signed with İstanbul BlackBerry of Turkey.