As May rolls in, fantasy baseball managers must navigate through an evolving landscape of bullpens. The New York Yankees’ Luke Weaver has emerged as a crucial add after stellar performances, including a 0.00 ERA in 14 innings, as Devin Williams flounders in the closer role. Meanwhile, the Texas Rangers face uncertainty with Luke Jackson, allowing Chris Martin to rise as a potential save source. In Arizona, Shelby Miller is capitalizing on injury woes, while Detroit’s bullpen appears to be a committee situation.

Other noteworthy mentions include Cincinnati's Emilio Pagan solidifying his status as the Reds' closer with eight saves, and the Rockies’ Zach Agnos showing promise despite the team's struggles. The White Sox's Jordan Leasure might be the best option for deeper leagues, although playoff hopes are slim. Managers must remain vigilant as bullpen dynamics continue to shift.