LOS ANGELES — Christian Walker, Yainer Diaz and Jose Altuve each homered, Ryan Gusto threw six strong innings, and the Houston Astros beat the Los Angeles Dodgers 5-1 on Sunday to complete their first three-game sweep at Dodger Stadium since May 9-11, 2008.

Three of Roberts’ four right-handed hitting reserves — Teoscar Hernández, Kiké Hernández and switch-hitter Tommy Edman — were unavailable because of minor injuries, which could force the Dodgers to make a roster move to bolster their bench depth before Monday night’s series opener at Milwaukee.

The Houston Astros, who have won 11 of their last 13 series, go for a sweep against the Los Angeles Dodgers on Sunday. Houston was undetermined on its starter against Emmet Sheehan (0-0, 3.25) of Los Angeles.