A day after Ben Zobrist was activated from the disabled list, Sean Doolittle was added to the roster. Zobrist is hitting third and playing second base, his first game in a month — he had been rehabbing from left knee surgery and was 5-for-16 in a five-game rehab assignment. Doolittle made five appearances in his rehab, giving up five earned runs in five innings with Class A Stockton, Double-A Midland and Triple-A Nashville. Doolittle said he’s excited to join the bullpen, adding, I’ve been watching these guys work their butts off for two month. The last three or four games, they’ve been playing real well, and my job is to not screw that up and try to keep that momentum going and hopefully we can start rolling. With both the A’s and Warriors playing home games Wednesday, the A’s are encouraging fans to use public transportation. First pitch is 12:35 p.m.