Education
Armstrong attended Seminole High School in Sanford, Florida.
Armstrong attended Seminole High School in Sanford, Florida.
He played college football for the University of Miami Hurricanes from 2009 to July 2012. He was not selected in the 2013 NFL Draft but was signed as an undrafted free agent by the Saint Louis Rams. He played both quarterback and safety.
As a senior he led Seminole to the 2008 FHSAA Class 6A state championship over Teddy Bridgewater"s Miami Northwestern.
During that year he threw for 1,400 yards and 14 touchdowns, rushed for 1,144 yards with 22 touchdowns and caught three passes for 29 yards and one touchdown as a QB. As a safety he had 70 tackles, two interceptions, three forced fumbles and two fumble recoveries. He was considered the 13th best recruit in 2009 by Rivals.com.
Miami Hurricanes
As a freshman with the Miami Hurricanes in 2009, Armstrong played in 10 games, recording 14 tackles. As a sophomore in 2010 Armstrong took over as a starter and has 66 tackles, three interceptions and a touchdown in 11 games.
On July 18, 2012, Armstrong was dismissed from the Hurricanes football team for being dishonest during an internal investigation.
Faulkner Eagles
On August 14, 2012, it was announced that Armstrong had transferred to Faulkner University and would play for the Faulkner Eagles, an National Association of Intercollegiate Athletics team, during the 2012 season. However, Armstrong was declared ineligible on September 11, 2012 due to the circumstances of his dismissal from the Miami Hurricanes. National Association of Intercollegiate Athletics rules prohibit any athlete "who has been permanently banned in a given sport at any four-year institution."
2013 NFL Draft
Saint Louis Rams
On April 27, 2013, after going undrafted in the 2013 NFL Draft, Armstrong was signed as an undrafted free agent by the Saint Louis Rams.
On October 6, 2014, the Rams released Armstrong.
Oakland Raiders
Armstrong was claimed off waivers by the Oakland Raiders on October 7, 2014. He was later waived on November 24, 2015.
San Francisco 49ers
On November 25, 2015, Armstrong was claimed off waivers by the San Francisco 49ers. On March 9, 2016, Armstrong signed a one-year contact extension with the 49ers.