(Photo credit: Geoff Burke-Imagn Images)

Curtis Mead hit a two-run homer, Keibert Ruiz had two hits and the Nationals beat the San Francisco Giants 3-0 in Washington on Sunday to avoid a series sweep.

Andrew Alvarez (1-0), called up earlier in the day from Triple-A Rochester, pitched 4 1/3 scoreless innings for the win, allowing three hits and striking out five without a walk.

PJ Poulin opened for Washington and was replaced by Miles Mikolas with two outs and two on in the first. Mikolas, who began the day with an 11.49 ERA, pitched four scoreless innings while allowing four hits in his best outing of the young season.

Rafael Devers and Drew Gilbert had two hits each for the Giants, who had won three straight, but went 0-for-11 with runners in scoring position.

San Francisco's Robbie Ray (2-3) gave up three runs on seven hits over six innings. He struck out seven and walked one.

The Giants put runner on first and second with two outs in each of the first two innings but did not score.

The Nationals got an infield single and a walk to open the third inning but couldn't cash in. Curtis Mead hit a blooper to shallow left field that dropped, but Keibert Ruiz briefly broke back towards second and was thrown out at third. Brady House flied to the warning track in center and CJ Abrams flied out.

Washington took a 3-0 lead in the fifth. Nasim Nunez reached on a bunt single and stole second. Ruiz hit shot to left center and Heliot Ramas made a diving effort but couldn't come up with it. Nunez scored and Mead lined the first pitch he saw from Ray out to left for a two-run homer.

The first two Giants reached base in the eighth inning on an error and a single, but Casey Schmitt grounded into a double play and pinch hitter Jerar Encarnacion struck out.

--Field Level Media