Jaylen Brown is offering a reward for a ring he says was lost at the duck boat championship parade on Friday, according to the Celtics star’s social media posts Sunday.

“Big reward for whoever find this ring,” Brown wrote over a photo of a ring on his fist posted to his Instagram story on Sunday. “(L)ost it at the parade if you find it (let me know) please.”

The ring has Brown’s logo for his personal brand, 7uice, emblazoned in the center and appears to have diamonds and gold on the face. It is not the championship ring, which is traditionally given to players during the first game of the next season.

Brown did not specify what the reward for the ring will be, beyond “big.” The finals MVP is signed to a nearly $300 million, 5-year contract with the Celtics.

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Brown rode prominently in the back of a duck boat during the massive parade on Friday, wearing a “State Your Source” shirt, catching a fan’s basketball, hoisting his MVP trophy and interacting with some of the millions of fans along the route.

Jaylen Brown lifts the MVP trophy during the duck boat parade for the World Champion Boston Celtics. (Nancy Lane/Boston Herald)