Just minutes after Jasson Dominguez ’s homer sealed the victory, the attention shifted to the bullpen. Manager Aaron Boone revealed that reliever Fernando Cruz had been quietly shut down with a shoulder issue, and another arm, Ian Hamilton, continued to struggle.

WEST SACRAMENTO, Calif. — When Jasson Dominguez isn’t playing for the Yankees or hitting in a batting cage or watching video of his at-bats or working on his left field play, and all of that takes up most of his time during the baseball season, he’s a 22-year-old kid who loves playing MLB The Show on PlayStation.

Domínguez entered Friday with two home runs in 104 at-bats this season. He now has five after Friday’s 3-for-4 performance. That offense came in support of another rookie in Yankees starter Will Warren, who held the A’s to one run over 7.1 innings ...

The Yankees have high expectations for rookie outfielder Jasson Dominguez, but his outfield defense has been a serious problem, one analyst determines.

A big difference for Domínguez this year, he is now comfortable communicating in his second language without the help of a translator.