Zimmermann will instead pitch a simulated game on Wednesday.
Zimmermann, who has served two stints of a month or more on the disabled list for a neck injury since July, got rocked in his return to the mound Saturday against the Orioles, surrendering six runs on four hits with three walks in just one inning pitched (plus four batters faced in the second inning). The Tigers lost 11-3.
Following the defeat, which left Detroit trailing Baltimore by one game in the wild-card standings, Ausmus did not commit to Zimmermann making his next start or remaining in the rotation.
Asked Saturday if he expected to start Thursday, Zimmermann said, "I hope so. I mean, I hope I'm pitching in five days."
Zimmermann's outing on Saturday was frustratingly similar to his last appearance -- another truncated start on August 4 in which he gave up six runs in 1.2 innings pitched before promptly returning to the disabled list.
But the 30-year-old insisted he felt good physically and was not hampered by injury.
"I feel good. I feel like I'm back to my old self. I just wasn't able to locate pitches and it's pretty embarrassing going one-plus innings and giving up six runs," Zimmermann said.
Ausmus, too, did not sound as if the team was worried about this being another situation where Zimmermann's health was in question. Previously, Zimmermann admitted to rushing his last comeback attempt, which ultimately resulted in another long absence.
"I've never been told that he wasn't 100 percent," Ausmus said. "He pitched his rehab and after his last rehab start he said he felt really good. That's why we went forward."
ESPN's Katie Strang contributed to this report.