ST. LOUIS - Blues forward Jaden Schwartz will wear No. 17 to honor his late sister, Mandi Schwartz.
Jaden announced the change on his Twitter account Friday evening.
"Sorry to the fans with #9 apparel," he tweeted. "But when I'm back in uniform I'll be looking a little different this year."
Mandi wore No. 17 during her three years on the women's ice hockey team at Yale University. She lost her two-and-a-half year battle with acute myeloid leukemia in 2011.
Since Mandi's passing, the Yale women's team has continued to raise awareness of the need for bone marrow donors through drives, fundraisers and special events. In January, Jaden and his Blues teammates traveled to Yale for the White Out for Mandi charity hockey game.
"Mandi never gave up," Jaden said in January. "She inspired me a lot and I learned a lot from her. Before she got sick, I wasn't really aware of cancer or knew a lot about it, but when something like that happens you learn a lot and want to do things to help whenever you can."
Mandi's No. 17 jersey still hangs in the women's locker room at Yale.
In St. Louis, the No. 17 became available after reports indicated Vladimir Sobotka had signed a three-year contract with Avangard Omsk of the Kontinental Hockey League.
Jaden previously wore No. 9.
Learn more about the Mandi Schwartz Foundation at their website, www.mandi17.org.