The never-ending injury woes continue for the New York Mets.
Matz said he experienced pain that was "a little different from regular soreness" Thursday morning, a day after a 20-pitch bullpen session. After he reported the issue to the training staff, the decision was made not to start him Friday.
"The trainer walked into my office, and I started shaking my head," Mets manager Terry Collins said.
"We'll see what the next few days has in store," Collins said of Matz.
The left-hander said the Mets had not discussed shutting him down yet and that he is still hopeful of returning.
Collins expects Matz to make a doctor's visit for further evaluation. The manager termed the shoulder issue a "delicate situation" and spoke of putting him on a rehab program to strengthen his shoulder and his back. Matz's last MRI, done about a month ago, came back clean. Another had not been scheduled as of yet.
Ynoa allowed one run and struck out eight in 4 2/3 innings in Sunday's win over the Minnesota Twins. His major league experience consists of 10 innings and 10 runs allowed over seven appearances.
If Ynoa pitches, the Mets' rotation would include three rookies -- Ynoa, Thursday starter Seth Lugo and Robert Gsellman -- none of whom was projected to be in the team's plans for 2016. If the Mets made the postseason and advanced to the National League Division Series, it's likely that two of them would be needed to start.