Jordan Hasay has withdrawn from the Boston Marathon due to a stress reaction in her heel. According to the race management, Hasay had an MRI today that revealed the injury.

"It is with deep regret that I have to withdraw from tomorrow's Boston Marathon," Hasay said in a statement through her race management. "Despite my team working around the clock to give me every chance to make the starting line, on this occasion it will not be possible. I wish my fellow competitors and everyone taking part the very best of luck and I look forward to toeing the line with them next year and for many years after that."

The 26-year-old's build-up to the Beantown race was not perfect, as she withdrew from the IAAF World Half Marathon Championships with a sore foot, though she told us at the press conference that her foot was "doing great" and feeling "100 percent."

Hasay's late withdrawal from Boston is a bummer, as she was one of the favorites to end the American women's 33-year title drought. It was here that she made her stunning debut at the distance one year ago, placing third overall and breaking the American debut record by three minutes in 2:23:00. In fall, she made it two-for-two in A+ marathon runs with a third-place, 2:20:57 effort in Chicago—the second-fastest time ever recorded by an American woman.

Unfortunately @JordanHasay has a stress reaction in the heel and will not be able to run. "Despite my team working to give me every chance to make it to the starting line, I won't be able to join you. I'll be cheering everyone on and hope you enjoy this historic race." pic.twitter.com/zwhXERrQBX

— Boston Marathon JH (@jhboston26) April 15, 2018

Boston Marathon's full statement:

"Unfortunately, Jordan Hasay has to withdraw from running Boston tomorrow. After recovering from plantar fasciitis, and running pain-free the past few weeks, her team wanted to ensure she was ready to go and scheduled an MRI today. The results showed a stress reaction in the heel and her doctor and team have made the decision that Jordan needs to take time to recover fully so there is no long-term injury. We support that decision and have invited Jordan to return to Boston next year."