Harris will start for the Athletics on Thursday against the Yankees, Martin Gallegos of MLB.com reports.
The A's had held off naming a starter until now, but Harris always made the most sense. The rookie left-hander struggled his last time out, but that rough outing had been preceded by a 2.57 ERA across his prior 28 innings. This will only be Harris' third traditional start, but he's also had several bulk relief appearances.