All the A's do is win when Mike Fiers is on the mound. They are 22-6 in his last 28 starts. The righthander is off his best start of the year, giving up two runs in six innings against the Giants.
The A's have been extremely tough, too, at home the past few seasons. This year is following that pattern. Oakland is 11-3 at RingCentral Coliseum. 
Andrew Heaney is in bad form allowing nine runs in his last two starts spanning 9 1/3 innings. He doesn't go deep into games either averaging fewer than five innings per start. The Angels are 1-4 in his past five starts. 
Like most clubs, the Angels have problems in Oakland dropping six of their last seven there. The Angels also are 6-20 in their last 26 road matchups versus righty starters.