In the aftermath of that outing, Niemann has been making slow progress while making sure to get rid of the inflammation in the shoulder before proceeding with regular throwing activity.
Wednesday was the first time Niemann has thrown off a mound since that Toronto start, and the 6-foot-9 right-hander said that all went well. He threw approximately 30 pitches, all fastballs, and experienced no problems.
"It was a great day. It's also bittersweet, too, to be able to say [that I'm healthy] with one day left to go [in the season]," Niemann said. "Sad and disappointing, but I'm glad we got back to the point where I'm healthy and able to throw a ball again. That's all we need to do, and once we get to that point we know we can be successful, we know we can be good."
Overall, Niemann feels much better than he did last week, and he doesn't anticipate needing to undergo an MRI or have any kind of medical procedure on the shoulder.
"I'm really confident that everything is good and all the doctors are right, and I trust that going into the offseason," he said.
Niemann plans to "stay with the program and keep doing all the rehab stuff."
Playing winter ball could also be in his future.
"Honestly, I think that is still a possibility, because I'm going to keep [pitching]," he said. "I know what I can do when I'm healthy. If I have to prove that, I will. No big deal."
When asked about the prospect of showing up in Port Charlotte, Fla., ready for Spring Training with no restrictions, he said, "One hundred percent ready to go, absolutely."
This past spring, Niemann won the fifth spot in the rotation over Wade Davis, then made six starts before fracturing his right fibula in his seventh. He finished the season at 2-3, with a 3.08 ERA.