Steven Matz has irritation in his left elbow and will skip his next Grapefruit League start, Sandy Alderson said Sunday.
However, Matz will resume throwing on Monday and said he is not worried, according to Marc Carig of Newsday.
Matz, who had surgery to remove a bone spur in September and has dealt with elbow and shoulder issues among others since underdoing Tommy John surgery in 2010, was to start Monday. Zach Wheeler will get that start.
"It's worrisome that he continues to be injured off and on," Alderson told reporters. "That's the difficulty. We don't think it's serious. On the other hand, starting pitchers are relied on every five days. I'm not sure exactly where this is going to take us."
Alderson said the tenderness has "been there for a while." On Wednesday, Matz gave up five runs in four innings on Wednesday against the Marlins. A recent exam showed there is no structural damage in Matz's elbow.
Matz is 13-8 with a 3.16 ERA in 28 starts since 2015.
"He's not pitching," Alderson said, "... that's really the purpose of this conversation, rather than writing an epitaph."
Wheeler, Robert Gsellman and Seth Lugo could move into the rotation if Matz has an extended absence.
"We're still sorting through that," Alderson said. "Fortunately, Zack Wheeler is coming along. Gsellman has pitched very well. Lugo pitched well in the Classic. So yes, this is where the depth comes into play."