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    Should the Twins Shift Griffin Jax Back to Starting Pitcher?


    Cody Christie

    Driveline Baseball has helped multiple Twins players improve in recent offseasons. However, they are wrong to think Griffin Jax should shift back to a starting role.

    Image courtesy of Nick Wosika-USA TODAY Sports

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    Baseball is a game that is constantly evolving, with teams looking for a way to gain a slight advantage over the opposition. One trend in recent years is turning elite bullpen arms into starting pitchers. Players like Jordan Hicks, Garrett Crochet, and Michael King have made the transition during the last two seasons with varying levels of success. 

    Many relievers, including those on the Twins, served as starters before shifting to a relief role because of performance or injury concerns. Some of the best relievers in Minnesota history were “failed starters,” including Joe Nathan, Glen Perkins, and Taylor Rogers. Shifting to a bullpen role usually allows pitchers to add velocity and limit their pitch selection to improve their ability to get outs. Previously, teams didn’t consider shifting players back to starting if they provided value out of the bullpen, because why would they fix something that isn’t broken?

    Former Twins pitcher Zack Littell is another example of a reliever who has shifted back to a starting role, and he thinks others will follow that same path.  “I think you’re starting to see it more and more,” Littell said. “There’s some indicators like you look at the bullpen guy and he throws a lot of strikes. He punches out a good amount of guys. He doesn’t walk guys. He might give up some more hits in the bullpen, but as a starter you can kind of get away with that.”

    Griffin Jax is one of those “failed starters” who has found renewed life as a dominant late-inning arm. Earlier this week, Driveline Baseball posted a video from Chris Langin, their Director of Pitching, explaining why Jax should be the next reliever to jump from reliever to starting pitcher. To get a complete picture of Jax, it’s essential to look back at his time as a starting pitcher and see how he has developed during his bullpen tenure. 

    Jax spent most of his minor league career as a starter in the Twins farm system. He made 56 minor league appearances, and 50 came in a starting role. He posted a 3.24 ERA with a 1.19 WHIP and 6.8 K/9. His results as a starter at the big-league level were less successful. In 14 games, he allowed 47 earned runs on 68 hits in 69 1/3 innings. Jax struggled to get swings and misses as his K/9 dropped to 7.0, and batters posted a .842 OPS against him. His stuff wasn’t working as a starter, so the team moved him to the bullpen.  

    Jax has traits that are different compared to other relievers. Many bullpen arms focus on throwing two or three pitches in relief, but Jax has continued using a starter's repertoire with a four-pitch mix. His sweeper is his most regularly used pitch (41%), so he’d likely need to increase his fastball usage (27%) if he moved back to the rotation. In 2024, his fastball has allowed a .171 SLG, but the xSLG is .400, which is a sign that he might be getting lucky. His increased velocity in the bullpen is a sign of some mechanical adjustments, but there is no guarantee that he would sustain these changes with a starter’s workload. 

    Moving Jax to a starting role can’t happen in the middle of the season, so this is likely something he would need to prepare for in the offseason. Looking ahead to next season, every current member of the Twins starting rotation will still be under contract. There is also organizational depth, such as Louie Varland, David Festa, Zebby Matthews, Cory Lewis, and Marco Raya. Injuries can always impact a team’s depth, but the Twins seem to have more than enough starters for 2025. For now, Jax can concentrate on being one of the game’s best relievers and not worry about switching back to a starting role. 

    Should the Twins consider making Jax a starter? Leave a COMMENT and start the discussion. 

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    23 hours ago, Bodie said:

    Moving a short reliever into the rotation seldom works. 

    There are a lot of examples of it working extremely well just in the last couple seasons. And not just elite stuff guys like Hicks, but from non-dominant relievers too, like Seth Lugo. If he wants to give it a go the Twins should 100% encourage him to stretch out and worst case scenario, we're one year from today and he's sitting on a 5.50 ERA and they decide to throw him back in the pen. 

    There's obviously no way they would ever consider doing this right now in the middle of the season. 

    17 hours ago, tony&rodney said:

    Varland got lit up today to continue his minor league struggles after a recent decent start for the Twins. Maybe it is time to shift Varland back to the bullpen to get him some confidence (if he can find the groove he had last year in the pen).

    Varland's unlikely to be a viable rotation arm. He had some nice results in his last couple appearances (especially the 4 inning relief appearance), but the rocket ship contact velocity he's been giving up isn't going to produce sustainable good appearances.

    That said, if Varland moves into the 'pen again, he's probably there permanently, assuming he can be effective as a reliever.

    As the article clearly states this proposed move would be in the off-season to be ready for next season. There are many things to consider. 

    First, Jax has stated he would like to make the move. This obviously has something to do with starters being paid better. There might be other factors since the work regimen is so different. He might miss the routine of a starter. 

    The days of the Twins scrounging the dumpster for starters seems to have passed. They have young talent coming. Considering they don't like to pay retail for relievers, the bullpen will present more of a need next year. 

    Will his stuff play? If he keeps his stuff up, will his health continue? Jax has been very reliable, arguably the most reliable reliever during his tenure. How his stuff and health react to a move are unknown. 

    Who moves to open a spot? SWR may never let go of his place. Pablo, Ryan and Ober are entrenched. That leaves Paddack. At 7.5 million next year he may have priced himself out of a role in the Twins meagre bullpen budget. 

    With Jax's work ethic it is intriguing to see what he could become. He is the Twins best candidate for this move ( I wouldn't trust Duran to hold up). If the Twins were willing to spend on the pen then maybe. As things stand I would take a hard pass on this. 

    As a side note it is curious that Driveline's brass would promote something like this. They have a relationship with the ballclub to maintain. Are they over stepping their bounds here?

    28 minutes ago, NYCTK said:

    There are a lot of examples of it working extremely well just in the last couple seasons. And not just elite stuff guys like Hicks, but from non-dominant relievers too, like Seth Lugo. If he wants to give it a go the Twins should 100% encourage him to stretch out and worst case scenario, we're one year from today and he's sitting on a 5.50 ERA and they decide to throw him back in the pen. 

    There's obviously no way they would ever consider doing this right now in the middle of the season. 

    Lugo had quite a bit of success as a starter:
    2016 47 IP, 2.68 ERA
    2017 98.1 IP, 4.76 ERA
    2018 23.0 IP, 3.91 ERA
    2020 26.1 IP, 6.15 ERA
    In 2020, the Mets just randomly decided one day at the end of the season Lugo was going to be a starter and instead of pitching 1 inning, he was going to pitch 5 or 6. Lugo had a couple really awful starts that skewed his numbers, but again, pretty successful.

    Here's an article supporting what you're talking about, though. https://www.mlb.com/news/mlb-relievers-succeeding-as-starting-pitchers-in-2024

    I just don't think Jax is going to be so effective.

    16 hours ago, NYCTK said:

    There are a lot of examples of it working extremely well just in the last couple seasons. And not just elite stuff guys like Hicks, but from non-dominant relievers too, like Seth Lugo. If he wants to give it a go the Twins should 100% encourage him to stretch out and worst case scenario, we're one year from today and he's sitting on a 5.50 ERA and they decide to throw him back in the pen. 

    There's obviously no way they would ever consider doing this right now in the middle of the season. 

    Lots?  There are very few actually.  

    Jax is 29 years old.  He has over the last 4 years transitioned from a back end starter to one of the more elite relief pitchers in baseball.  Why would you want to change that?  

     

    6 hours ago, SwainZag said:

    Lots?  There are very few actually.  

    Jax is 29 years old.  He has over the last 4 years transitioned from a back end starter to one of the more elite relief pitchers in baseball.  Why would you want to change that?  

     

    There are plenty. 

    And the reason is straight forward. A mediocre starting pitcher is still way more valuable than a set up man. The twins are quite fortunate SWR has worked out as well as he has. There was no indication he was going to come up and be a decent starter and if it failed we'd have a massive hole. 

     

    3 hours ago, NYCTK said:

    There are plenty. 

    And the reason is straight forward. A mediocre starting pitcher is still way more valuable than a set up man. The twins are quite fortunate SWR has worked out as well as he has. There was no indication he was going to come up and be a decent starter and if it failed we'd have a massive hole. 

     

    Disagree. 

    Mediocre starters are only more valuable on a spreadsheet. 

    In truth, they're pretty easy to find. Every team has several. Interchangeable, unremarkable, putting up similar results to many others.

    Impact relievers are way more impactful. They're harder to find, as well.

    We've got one in Jax. Leave it alone. 

    If Jax could throw this kind of stuff for 6 innings every five days, great. Move him.

    But he won't. Been there, done that.

    2 minutes ago, USAFChief said:

    Disagree. 

    Mediocre starters are only more valuable on a spreadsheet. 

    In truth, they're pretty easy to find. Every team has several. Interchangeable, unremarkable, putting up similar results to many others.

    Impact relievers are way more impactful. They're harder to find, as well.

    We've got one in Jax. Leave it alone. 

    We'll agree to disagree then, but what's the harm in trying? 

    A) If Jax actually wants to do it, allowing him to try helps build the relationship with the player

    B) If he succeeds, he could be Seth Lugo, a good #2 or #3 starter

    C) If he fails, we can throw him back into the bullpen and he's still Griffin Jax

    There's only upside and no visible downside to it unless you're concerned about injury. I don't know if there's any evidence of increased injury risk from someone going to bullpen to starting in the offseason. 




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