In 2016, a combination of injury, trades, and poor-performance led to the Atlanta Braves using an MLB-high 16 different starting pitchers (bonus points to anyone who can name them all without looking).
The only pitcher to hold down his rotation spot from Opening Day through the end of the season was Julio Teheran and even he missed time with an injury and, at one point, looked like a potential trade candidate.
While using that many different starters is noteworthy, that’s not the feat Atlanta pulled. It isn’t in itself all too strange, especially for a team of veteran reclamation projects and unproven youngsters.