As the 2025 MLB season hits its stride, savvy fantasy players are eyeing the waiver wire for beneficial additions. This week, Eric Cross highlights several under-rostered players poised for impact. Miguel Vargas of the Chicago White Sox is showing promise after a sluggish start, with a strong May showing that includes a .292 average and solid contact metrics.

Hyeseong Kim of the Los Angeles Dodgers has made an immediate impact since his call-up, contributing speed and high contact rates. Jake Cronenworth from the San Diego Padres has returned from injury and is hitting with power and a high OBP, making him a worthy add. Meanwhile, Addison Barger of the Toronto Blue Jays is finding his footing, showcasing improved metrics and the potential for a regular role.