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Jason Kidd’s top assistant is leaving the Mavericks

Originally posted on Larry Brown Sports | By Grey Papke | Last updated Jun 22, 2025 6:11 PM ET

Jason Kidd is losing a key member of his Dallas Mavericks coaching staff to a rival.

Top Mavericks assistant Sean Sweeney is set to become the new associate head coach of the San Antonio Spurs, according to Shams Charania of ESPN. Sweeney had been courted by new coach Mitch Johnson to take the position.

Dallas Mavericks assistant Sean Sweeney has agreed on a deal to become the associate head coach of the San Antonio Spurs under Mitch Johnson, Andy Miller of Klutch Sports tells ESPN. Sweeney has interviewed for coaching jobs in recent years and now departs Mavs for elevated role. pic.twitter.com/ohfgseOqCf
— Shams Charania (@ShamsCharania) June 22, 2025

Sweeney has worked with Kidd in both Milwaukee and Brooklyn, and moved with him to Dallas when Kidd took that job in 2021. It is an interesting time for him to leave, with the Mavericks about to land Cooper Flagg in the NBA Draft later this month.

The Mavericks are still dealing with some uncertainty regarding Kidd as well. The New York Knicks targeted him as their new head coach, and while they were rebuffed, there have been reports that the door might not be completely shut on the possibility.

Perhaps this is a signal that Kidd is not fully committed to the Mavericks. At the very least, Sweeney thought it was time to move on, and lands a nice gig elsewhere.

This article first appeared on Larry Brown Sports and was syndicated with permission.

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