McAdoo, who was forced from Tuesday's game against the Rockets with a laceration to his head, is currently receiving stitches and will be evaluated for a concussion, Marc J. Spears of ESPN.com reports.
Seager, who raised his spring average to .308 with a 2-for-3 effort in Monday's Cactus League loss to the Padres, is hoping to avoid the sluggish start that has been a part of his last three seasons, Bob Dutton of the Tacoma News Tribune reports. "I'm going to try to get more hits than I did last year," he reiterated. "But other than that, I'm going to pretty much try to be the same. If it happens again, and you keep the big picture in mind, you can get out of it."