Phillies ink two-year deal with Brad Keller to bolster bullpen originally appeared on NBC Sports Philadelphia
Middle relief was a clear area of need for the Phillies in 2025.
From innings six through eight during the regular season, Phillies relievers posted a 4.50 ERA — the fourth-highest mark in the National League.
On Wednesday, they addressed that need. Robert Murray of FanSided reported that the Phillies have signed right-hander Brad Keller to a two-year, $22 million deal, with details first reported by Matt Gelb of The Athletic.
Keller, 30, broke into the majors in 2018 as a starter with Kansas City. Over his first three big-league seasons, he was steady, posting a 3.50 ERA across 360 1/3 innings. The next four years, however, marked a downturn. Between 2021–24, he recorded a 5.18 ERA and a 1.62 WHIP over 88 appearances (57 starts).
That trajectory changed last season.
In January, Keller signed a minor league deal with the Cubs, made the Opening Day roster, and quickly became one of Craig Counsell’s most reliable arms. In 2025, he was excellent, logging a 2.07 ERA across 69 2/3 innings with 75 strikeouts and 22 walks.
He was dominant in October for Chicago, making five postseason appearances with a 1.59 ERA and two saves.
The breakout was driven by improvements to his five-pitch mix. Keller leaned heavily on a sweeper–sinker–changeup combination, throwing the trio more than 40 percent of the time. Opponents hit under .190 against each pitch, and his sweeper emerged as a true weapon — batters hit just .067 with a .133 slugging percentage against it.
As expected, the performance was backed by the metrics. Keller ranked in the 86th percentile or higher in seven Baseball Savant categories, highlighted by a 30.6 percent hard-hit rate that placed him in the top two percent of the league.
The Phillies are betting that the improvement is real, particularly given his effectiveness against right-handed hitters, who posted just a .466 OPS against him.
Whether Keller settles in as a primary middle-relief option — he recorded a 1.59 ERA in seven appearances in the sixth inning — or slides into a higher-leverage role behind Jhoan Duran in the eighth (six earned runs allowed across 38 outings), he fits cleanly into Philadelphia’s bullpen plans.
With starting experience, swing-and-miss stuff and recent success in leverage spots, Keller profiles as a strong, under-the-radar addition.