Carlos Martinez threw 6 2-3 solid innings, and Seth Maness (3-0) got the win. Trevor Rosenthal closed for his 24th save in 25 opportunities, getting Matt Kemp to ground out with a runner on to end it.
Rosenthal had a 23-game scoreless string halted on Friday. San Diego won the first two games of the series, including a 2-1 victory Friday.
All four losses during St. Louis' skid came at home.
