By Pearl Allison Lo

~ In the Oakland Athletics’ first interleague game this season, Jesse Hahn held San Diego at bay, for a 9-1 win Monday.

Hahn won the battle of both pitchers facing their former teams for the first time. He went 6.2 innings, gave up three hits, tying a season-low, one run and two walks while striking out four.

Padres’ starter Tyson Ross only had one clean inning, though the second was pretty close. He went five innings, tying a season-high with four runs and five walks, as he struck out six and gave up seven hits.

The last time the two teams faced each other at Petco Park was in 2009.

Runwise, the A’s and their opponents are respectively 17-2. Oakland’s Stephen Vogt hit a two out, first pitch grand slam in the top of the eighth. He also had two hits and another RBI. Brett Lawrie went 3-for-5 with two RBIs and Ben Zobrist walked a career-high four times with a hit and three runs scored.

San Diego has only scored four runs their past three games.

Both teams put up runs in the third inning, one run for each coming off a walk.

Singles surrounded the A’s walk. Eric Sogard had a one out single, then stole second, Josh Reddick singled him in, Zobrist walked, Vogt singled in Reddick and Lawrie brought Zobrist home with an infield single to make it 3-0.

In the bottom of the third, Alexi Amarista led off with a walk, Tyson Ross sacrificed and Will Venable doubled in Amarista to make it 3-1.

With one out in the top of the fifth, Zobrist walked and Vogt singled to put runners at the corners. This resulted in a mound meeting, after which Lawrie made it 4-1 and the bullpen started warming up.

San Diego started the top of the sixth with pitcher Nick Vincent on the mound.

The Padres threatened in the bottom of the seventh. Yangervis Solarte almost had a two-run home run. With two outs and runners on the corner, Oakland brought in Drew Pomeranz to pitch. Upton Jr. stole second, but Pomeranz eventually got Venable to ground out.

The A’s did not let up in the top of the eighth. They had no outs and runners on the corner, due to a lead off walk by Marcus Semien and a pinch-hit single by Billy Butler. Burns then made it 5-1 on a single before Vogt’s slam later.

Game notes: Long-time San Diego manager Bud Black was fired before the game, and replaced by Bench Coach Dave Roberts. The Padres are now in the hunt for a 2015 Interim Manager. Game two of this four-game series kicks off at 12:40pm Tuesday.