The former Tottenham and Liverpool striker duly converted to complete the 3-1 triumph.
Manchester United legend Beckham could've crowned his Galaxy career with the spotkick, but insisted: "I told Landon to take it but he said he was too tired. So I told him to let Robbie take it because I didn't want it as I've missed a few over the years.
"All I wanted was to win the game. It's not about me taking a penalty to top things off.
"Being successful doesn't come easy. I tell my children every day that if you want to be a success it's hard graft."