Miami Marlins right-hander Jose Fernandez has a strained right biceps and is headed for the disabled list.
Manager Dan Jennings said Sunday that Fernandez had an MRI exam Saturday.
"We won't put him out there until we know he is 100%," Jennings said. "There is no need to push it or rush it."
Fernandez threw 76 pitches over five innings against the Atlanta Braves on Friday night and Saturday complained of shoulder stiffness.
He is 4-0 with a 2.30 earned-run average in seven starts this year. He had elbow ligament-replacement surgery in May 2014.
Mets' David Wright to start rehab assignment
New York Mets third baseman David Wright is ready to start a minor league rehab assignment as he works to return from spinal stenosis.
Wright will be the designated hitter Monday night for Class-A St. Lucie. He is scheduled to play in the field Tuesday.
The Mets have not announced a timetable for when Wright could rejoin the team.
Yankees' Brett Gardner is hit by ball thrown from stands
New York Yankees left fielder Brett Gardner was hit in the back of the head but not injured when a spectator at Yankee Stadium threw back a ball that Toronto slugger Jose Bautista hit for a home run in the fourth inning.
Gardner stayed in the game.
"I just wore it. Didn't even turn around," he said. "It wasn't like it was coming from the second row. It was a long ways away."
Wrigley Field is evacuated after game
A telephone threat prompted police to evacuate Chicago's Wrigley Field for about an hour Sunday after the Cubs' game with the San Francisco Giants.