The MLB season is at its midway point, and while the waiver wire has been thoroughly scouted, some hidden gems still remain. Players under 40% ownership on Yahoo are still available and could significantly impact your roster. Here are three players to consider adding as the season rolls on.

Ben Rice, the Yankees' first baseman, is showing promise despite a recent slump. After a scorching April, Rice's performance dipped but he's earning more playing time thanks to his versatility at both first base and catcher. His eligibility as a catcher makes him particularly valuable in deeper leagues.

Emmet Sheehan, a Dodgers pitcher, is back from injury and has shown impressive strikeout potential. After a powerful start at Triple-A, he's poised for a quick return to the big leagues, adding depth to a battered Dodgers rotation.

Finally, Dominic Canzone of the Mariners is making waves with his recent call-up. His power bat and high contact rate could provide an offensive boost for Seattle, making him a worthy addition for teams needing outfield help.