Rollins, a veteran Republican campaign manager, plans to reduce his role to a senior advisory capacity, citing health reasons and the toll of day-to-day management of the campaign, and his deputy, David Polyansky, is leaving.
"I wish I was 40 years old, but I'm not," Rollins told Politico. "I'm 68 years old. I had a stroke a year and a half ago. I'm worn out."
Rollins said he's still committed to Bachmann, R-Minn.
"I want nothing but the best for her, she's a great candidate, I'll continue to be there for her," he said.
Bachmann spokeswoman Alice Stewart said "the plan all along has been to restructure things after the (Iowa) straw poll."
"Ed has -- and will always be -- a valuable part of the campaign. Given his health, now is the perfect time for Ed to move out of the strenuous day-to-day activities and into a senior adviser role," Stewart said in a statement.
Politico, citing a Republican source, said Polyanksy had "strategic differences on the path forward" with Bachmann.
"I wish Michele nothing but the best, and anyone who underestimates her as a candidate does so at their own peril," Polyansky told the publication.
Rollins and Polyanksy, working with others including veteran pollster Ed Goeas, had headed the team that led to Bachmann's Straw Poll win in Iowa but she has lost ground since.