Walt Weiss leads the NL Manager of the Year market at 39.5% implied probability due to the Atlanta Braves’ dominant first-half performance under the first-year skipper, who took over after Brian Snitker’s retirement. The club sits atop the NL East with a .648 win percentage and strong run differential, far exceeding 2025 expectations despite injuries. Traders credit Weiss’s aggressive bullpen tactics and clubhouse continuity for sustaining momentum. Don Kelly (11%) and Pat Murphy (10.2%) trail on the strength of solid Pirates and Brewers campaigns, respectively, while the rest of the field remains fragmented with no other team matching Atlanta’s early dominance. The race could tighten if late-season injuries or division races shift narratives before the BBWAA vote.