My code doesn't print what it intended to.

# TODO Create an empty list to maintain the player names
players = []

# TODO Ask the user if they'd like to add players to the list.
add_player = input("Would you like to add players to the list? (yes/no)")

# If the user answers "Yes", let them type in a name and add it to the list. 
# If the user answers "No", print out the team 'roster'
while add_player.lower() == 'yes':
    player_name = input("\nEnter the name of the player to add to the team: ")
    players.append(player_name)
    add_player = input("Would you like to add players to the list? (yes/no)")

# TODO print the number of players on the team
print("\nThere are {} players on the team.".format(len(players)))

# TODO Print the player number and the player name
# The player number should start at the number one
player_number = 1
for player in players:
    print("Player {}: {}".format(player_number, players))
    player_number += 1

# TODO Select a goalkeeper from the above roster
goalkeeper = input("Please select the goal keeper by selecting the player number. (1-{})".format(len(players)))

goalkeeper = int(goalkeeper)

# TODO Print the goal keeper's name
print("Great!!! The goal keeper for the game will be {}".format(players[goalkeeper -1]))
# Remember that lists use a zero based index