ARLINGTON, Tex., May 2 — With one misstep on Tuesday, Phil Hughes, a Yankees rookie pitcher, lost his chance for a no-hitter. On Wednesday, Marty Miller lost his job.

Miller was not the manager. He was not even on the playing roster. He was the first-year strength coach, and he became the Yankees’ latest casualty in a dreary 10-14 start to the season that includes four hamstring injuries to pivotal players.

“It’s time to find something else that works,” General Manager Brian Cashman said in explaining the dismissal. “We’re experiencing too much of this stuff. I can’t tell you it’s directly related to him, but we’ve never dealt with this much of it at the same time, either. So I can’t deny it or ignore that.”

Cashman hired Miller last winter to the newly created, if awkwardly titled, role of director of performance enhancement.