Britton was supposed to go three innings in a Single-A game at Twin Lakes Park, but he's bothered by inflammation in the shoulder. Team orthopedist Dr. John Wilckens examined him today.
The Orioles will know more about Britton's condition and future availability on Tuesday.
Britton threw two innings and 31 pitches Thursday in a game against the Boston Red Sox's Single-A team. He threw four more pitches in the bullpen and showed up the next day without any health issues. However, the shoulder began aching yesterday.
"He was a little sore today," manager Buck Showalter said. "We'll see where we are with him on Tuesday. He threw in the game, felt great, took his work day, felt good, but I think he called Richie (Bancells) last night. We were waiting to see what it was like today. It was a little sore and Dr. Wilckens looked at him. We may have to make some adjustments there.
"Dr. Wilckens doesn't think it's anything serious. Just something we've got to manage and try to get it quieted down. It could be Tuesday. I don't know. But I would have liked to see him recover from his outing a little better than that."
Britton still hasn't pitched in a Grapefruit League game, and it's become increasingly likely that he won't be ready when the Orioles break camp.
"Let's see where we are on Tuesday. I'm not going to jump the gun on it," Showalter said.
Jake Arrita will start Monday, and he's scheduled to go four innings. Britton was supposed to pitch the first three.
The rest of the players in camp will enjoy their only day off in spring training.