From the moment the ball left his right hand, David Phelps knew something was wrong. In the bottom of the seventh inning on his seventh pitch of his appearance, Phelps threw a 93 mph fastball to Drew Butera on a 3-2 count. Butera hit a soft fly ball for the first out of the inning.

But right after delivering the pitch, Phelps appeared to be in pain and motioned for the Mariners’ trainers to come to the mound.

Head athletic trainer Rick Griffin and manager Scott Servais hurried to the mound. After a brief conversation, Phelps exited the game with Griffin.

The early diagnosis from the Mariners’ medical staff was that Phelps left the game with right elbow discomfort, which is never a good thing. Phelps will fly back to Seattle immediately and meet with team doctors on Monday.

“The last couple of times out, I just really haven’t gotten loose like I have in the past,” he said. “As far as getting loose out of the bullpen, it is fine, but as soon as I get in the game it’s a little tight. I can tell the ball just isn’t coming out and my stuff hasn’t really been the same. In the past, I’ve pitched through things until I broke my arm. I thought it was better to let (trainers) come out. They’ve known about it and we’ve been treating it.”

Phelps pitched on Friday night, throwing a scoreless frame. But he pointed back to his outing on July 31 vs. the Rangers where it was an issue. It felt the same against the Royals.