Beckham appeared for the first time this season in Galaxy's 3-1 win.
"Being out there felt good," Beckham said. "I've never been out of the game for such a long time."
The 35-year-old had little involvement in the match Saturday night, although he did pick up a yellow card for his challenge on Emmanuel Ekpo.
Beckham said he was feeling the effects of being out of the game so long.
"After 10 minutes on the field, I thought I was dying," Beckham said. "But I came through it, felt good after that and finished strong."