4. RHP Kirby Yates
One of the more intriguing options on this list is Kirby Yates, who is also the oldest player and will be entering his age 38 season in 2025. Yates missed the entirety of 2021 and most of 2022 because of Tommy John surgery, but stormed back on the scene with the Atlanta Braves last year. He posted a 3.28 ERA with 80 strikeouts over 60.1 innings while keeping opponents to a .167 batting average.
Yates has remarkably kept the momentum going and emerged as the primary closer for the Texas Rangers this year. Although the Rangers have significantly regressed after their World Series win in 2023, Yates has not only been a bright spot but he's been nothing short of stellar for the team. He has converted all 16 of his save opportunities, struck out 46 hitters in 34.1 innings and posted an ERA of 1.05. His work this year has also garnered him his second career All-Star appearance.
Yates is set to hit free agency after 2024 and he should be heavily considered given his performance and track record. Before closing for Texas, Yates recorded 53 saves for the San Diego Padres from 2018-2019. Although his fastball only tops out a 93 mph, he has proven to still have what it takes to close out ballgames even after his injuries.