Nunez signed a one-year contract with the Mexican League's Toros de Tijuana on Wednesday.
Nunez agreed to a minor-league contract with the Brewers on Monday.
Nunez was released by the Tigers on Friday.
Nunez cleared waivers Monday and was outrighted to Triple-A Toledo.
Nunez was designated for assignment by the Tigers on Saturday.
Nunez is out of the lineup for Thursday's game against the Angels.
Nunez is starting at first base and batting fifth in Sunday's game against Cleveland.
Nunez's contract was selected by the Tigers on Wednesday.
Nunez cleared waivers and was outrighted to Detroit's alternate training site Monday.
Nunez was designated for assignment Wednesday.