Jalen Ramsey stops Tyreek Hill, who left the game with a shoulder injury. (Phelan M. Ebenhack/Associated Press)

Kansas City Chiefs wide receiver Tyreek Hill was treated at a Jacksonville hospital Sunday after suffering a shoulder injury during a season-opening win over the Jaguars.

Hill had a “sternoclavicular joint injury which is where your clavicle comes into your sternum,” Rick Burkholder, the team’s head athletic trainer, said in a statement issued by the team. “Those can be injured coming out the front, up top or in the back. If it goes posteriorly or back, it becomes a medical issue for us so that we worry that there’s more problems.

“His came back posteriorly and he didn’t have any medical issues, but we still transported him to Baptist Medical Center and we turned his care over to Brett Frykberg, who is an ortho-trauma physician.”

The sternoclavicular joint lies between the collarbone and the sternum and an injury to it can be dangerous. As Dr. David Geier explained when Ben Roethlisberger was injured in 2012: “An anterior dislocation of this joint means that the collarbone has popped out in front of the sternum. A posterior dislocation means that the collarbone has gone behind the sternum. While both types of dislocations are very serious, a posterior dislocation can be a surgical emergency, as the end of the collarbone becomes extremely close to the airway and large blood vessels of the heart and chest.”

Hill will reportedly not need surgery on his collarbone injury but “will miss a few weeks," ESPN’s Adam Schefter reported.

It was a physical season opener, with Jaguars quarterback Nick Foles injuring his shoulder in the first quarter and Jaguars linebacker Myles Jack being ejected. Hill had caught two passes for 16 yards before being injured on a tackle by Jalen Ramsey after an eight-yard gain.

The injury to Hill marked a tough opening half for the Chiefs, who watched Patrick Mahomes briefly limp off the field in the first quarter. But the reigning NFL MVP quarterback was out only briefly, returning with his ankle taped. The Chiefs said he had a sprained ankle.

Only last week, Hill and the Chiefs agreed to a three-year, $54 million contract extension that placed him among the highest-paid wide receivers in the NFL and came after a tumultuous offseason.

In July, the NFL announced that it would not suspend Hill over allegations that he abused his 3-year-old son. Hill and his fiancee, Crystal Espinal, were the subject of an investigation in Johnson County, Kan., over injuries suffered by their son in March. Authorities did not file charges in the case, though Johnson County District Attorney Steve Howe said he believed a crime had been committed.

Hill called the allegations false and told reporters that he was “working every day to be a better father, a better person, a better citizen, a better teammate and a better son, too, to my parents.”

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