Hahn, vying for a spot in the starting rotation, was charged with seven runs (five earned) in four innings. His spring ERA is 8.80.
Josh Rodriguez homered off Dodgers closer Kenley Jansen, who was making his first appearance since returning from the World Baseball Classic.
A's Up Next: The A's will trek to Maryvale on Sunday for a road matchup with the Brewers. Right-hander Jharel Cotton, who will begin the season as the club's No. 3 starter, will be on the mound for the 1:05 p.m. PT contest that can be heard live on Gameday Audio.