Phillip Norris "Army" Armstrong (September 15, 1898 – October 11, 1981) was an American football player and coach.

Norris played tackle and halfback for Centre College in Danville, Kentucky and was a key offensive player[1] during the 1921 Centre vs. Harvard football game, and was captain of the team that year.

[5] After graduation from Centre, Norris played professionally for the 1922 season as a tackle for the Milwaukee Badgers of the National Football League (NFL) alongside his college teammate Bo McMillin.

[15] The university honored his contributions by inducting him into the school's "Hall of Fame" in 1973.

[16] Key games for Carroll under Armstrong included the 1925 victory over Great Lakes Naval by a score of 73–0, and an undefeated 1925 season.