The only names that jumped to mind are , Jeff Baker, and Mike Olt. Prado is kinda expensive and he would presumably take over as the regular second baseman if re-acquired, not serve as a part-timer. Baker has historically mashed lefties (career 126 wRC+) but hasn’t done it this year (99 wRC+). Olt has only played a handful of games this season due to a wrist injury and owns a career 71 wRC+ against southpaws. I’m not sure he’s the answer either.