National Basketball Association roundup

The 6-foot-10 Simmons said he has bought into head coach Brett Brown's vision for the 2017-18 season, even though he would be one of the tallest players to ever play point guard in the NBA.

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The Sacramento Kings announced that they have signed swingman Vince Carter, forward Zach Randolph and guard George Hill, making official what had been reported earlier.

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Los Angeles Lakers rookie guard Lonzo Ball will sit out Monday's Las Vegas Summer League game against the Sacramento Kings with a groin injury, multiple outlets reported.

The injury isn't considered serious for Ball, but his expected absence puts a damper on a matchup that would've featured two of the top five picks of this year's draft. Ball was the second overall pick and De'Aaron Fox was taken No. 5 overall by the Kings.

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The Chicago Bulls signed free agent guard Justin Holiday, the team announced.

The Bulls did not disclose terms of the deal, but the Chicago Tribune reported that Holiday agreed to a two-year, $9 million contract.