According to Jason Jones of The Athletic, the Sacramento Kings are signing forward BJ Johnson of the Lakeland Magic for the rest of the season:
The Kings are signing BJ Johnson of G League Lakeland for rest of season. They will assign him to the G League immediately so he can resume the playoffs.
— Jason Jones (@mr_jasonjones) April 2, 2019
As Jones mentions, the Kings will assign Johnson back to the G League as the Magic are currently in the playoffs and will face the Long Island Nets Tuesday evening in the Conference Finals.