In this week's Waiver Wire Watch, players with under 40% roster rates are highlighted for potential adds based on recent performance. Will Benson of the Cincinnati Reds stands out after a hot start with five homers in 11 games, while Trevor Larnach shows promise in the Minnesota Twins lineup. Jordan Beck of the Rockies benefits from Coors Field's environment, and Hyeseong Kim's playing time with the Dodgers looks promising. The article also discusses emerging pitchers like Gavin Williams and Hayden Birdsong, who are gaining traction in their rotations.