Howard played 399 games for Manchester United and Everton in the Premier League and 185 for the MetroStars and Rapids in MLS.
Memphis 901 is coached by Tim Mulqueen, Howard's mentor as a goalkeeping coach.
“When he’s in the locker room as a player," Mulqueen said, "he will act as a player. His focus is only going to be on winning. There will be very clear lines that the players will recognize."
Memphis 901 finished in 15th place out of 18 teams with a 9-18-7 record in the Eastern Conference in 2019.
“I’ve made a commitment to the city and people of Memphis to build a perennial playoff team," said Howard, who the last of his 121 appearances for the USA in the 2-1 loss to Trinidad & Tobago that eliminated it from the 2018 World Cup.