Here is My Aprproach

players = []
answer = 'yes'
while answer == 'yes':
        answer = input('Would you like to add a player to your list yes|no  ').lower()
        if answer == 'yes':
            add_name = input('Enter the name of the player you like like to add ')
            players.append(add_name)
print('The number of the players on this team is {}'.format(len(players)))
count = 0
while count < len(players):
    print('Player {}: {}'.format(count+1 , players[count]))
    count += 1
goalkeeper = int(input('Please Select a goalkeeper from 1-{}  '.format(len(players))))
print('The Goalkeeper for this game will be {}'.format(players[goalkeeper-1]))