While it is still a loss for the Golden Knights, the team stressed Stone's injury has nothing to do with his back, which has caused the 31-year-old to miss a major amount of time over the past few seasons. He's been placed on injured reserve.
According to various websites, a lacerated spleen can take anywhere from three weeks to three months before athletes can get back to unrestricted activity. The timeline depends on the severity of the laceration, and the general health of the patient.