I don't see the Angels sweeping the A's after winning the first two games of this series.
Oakland is the far superior team so I'm attracted to the A's at this short price. 
A's starter Chris Bassitt is underrated. The righthander has pitched very well with a 1.08 ERA and 0.90 WHIP. Oakland is 6-0 in Bassitt's last six starts. The Angels are 4-8 versus righties. They also have a losing record in day games. 
This isn't a fade on Angels starter Griffin Canning. He's coming off a tough start in a loss to the Rangers this past Friday. But he's a promising pitcher.
I just like Bassitt, the situation where the A's are trying not to get swept and Oakland being the better team.