Free Agent Faceoff: Kenley Jansen vs. David Robertson

The free agent market for relief pitching has begun to heat up in recent days, with right-handers Chris Martin, Andrew Kittredge, and Jeff Hoffman all coming off the board. While top free agent relievers like Tanner Scott, Carlos Estévez, and Kirby Yates have gotten the majority of attention in the rumor mill of late, there’s a pair of veteran relief options available who between the two of them have more than 30 years of late inning experience on their resumes: right-handers Kenley Jansen and David Robertson. Both have plenty of closing experience and are on the wrong side of 35 but have remained effective even as they’ve aged into the latter stages of their careers, making them particular interesting options for clubs in need of bullpen help but with a preference for short-term deals.

Of the two, Jansen has the more storied career as a potential future Hall of Famer. The four-time All-Star and longtime Dodgers closer has taken a step back from his peak years in L.A., but his 447 career saves rank fourth all-time and he remains among the league’s better relief options. He departed the Dodgers following the 2021 season and has pitched for the Braves and Red Sox in the three years since then, posting a solid 3.42 ERA (126 ERA+) with a 3.26 FIP, a 29.9% strikeout rate, and an 8.9% walk rate while converting 97 of his 112 and save opportunities. He also boasts a dominant postseason resume, with a career 2.20 ERA, a 37.6% strikeout rate, and 20 saves across ten playoff runs.

The 37-year-old Jansen’s 3.44 ERA and 3.30 FIP during his two years in Boston were both solid, but his strikeout rate (28.1%) trended downward while his walk rate (9.2%) has begun to tick up. Most concerning, Jansen has begun allowing far more damaging contact. After posting a barrel rate of just 5.8% and a 25.7% hard-hit rate from the beginning of Statcast data in 2015 to the end of the 2022 season, those same figures have ballooned to 9.1% and 36.5% since he arrived in Boston. That’s left him with a 4.30 xFIP that’s more in line with middle relief options like Phil Maton and Héctor Neris than what’s expected of an elite closer, though other metrics like SIERA (3.62) are more favorable.

Robertson, meanwhile, has split his time between setup work (196 career holds) and closing (177 saves) over his 16-year career. He saved just two games for the Rangers last year and last saved more than 20 games in a season back in 2016. He’s the older of the pair and will turn 40 in April. That’s not to say Robertson is without his advantages, however. After a trio of lost seasons due to injury from 2019 to 2021, Robertson has reclaimed his place among the game’s top relievers with numbers that largely outshine Jansen over the past three years.

While bouncing between the Cubs, Phillies, Mets, Marlins, and Rangers over the past three years, Robertson has posted a 2.82 ERA and 3.24 FIP while striking out 31.1% of opponents in 201 innings of work. His 10.5% walk rate during that time leaves something to be desired and is more than a full percentage point higher than Jansen’s, but Robertson delivered a much more robust platform season with a 3.00 ERA and a 2.65 FIP in 72 innings for the Rangers as compared to Jansen’s 3.29 ERA and 3.00 FIP in 54 2/3 innings for Boston. Robertson’s also been more flexible in terms of his role over the years; he’s shown comfort both closing and acting as a setup man, while more than 80% of Jansen’s career innings have come in the ninth inning or later.

If you were running a team in need of late-inning relief help this winter, which veteran righty would you rather have for 2025? Would you prefer the younger Jansen with his elite postseason performance and lengthy track record of success in the ninth inning? Or would you opt for Robertson’s stronger peripheral numbers, flexibility to work outside of the ninth inning, and excellent platform season? Have your say in the poll below: