Analyzing the Cubs' Bullpen Usage: Lessons for Managers and Fans

The Cubs have been flirting with the idea of a “fire‑and‑forget” approach all season, and the numbers are finally catching up. If you’ve ever watched a late‑inning rally stall because the closer never got a warm‑up pitch, you know why this matters right now – it’s the difference between a win that feels like a miracle and one that feels like a missed opportunity.

The Numbers Tell a Story

Take a look at Chicago’s last 15 games. The bullpen logged an average of 5.2 innings per outing, while the league average sits at 4.6. That extra work isn’t just a stat line; it’s a symptom of a deeper strategic puzzle. When a manager leans heavily on a handful of arms, fatigue creeps in, and the quality of each pitch can dip faster than a summer heat wave in Wrigley.

Workload vs. Effectiveness

A quick dive into the data shows three clear patterns:

1. High‑leverage innings are getting thinner. In the 7th‑8th inning stretch, the Cubs’ ERA (earned run average) climbs to 4.87, compared with a league‑wide 3.92.
2. The “closer” is being used as a set‑up man. Kyle Harrison, who was slated for 30 saves, has only 18, because he’s often called in during the 7th to bridge the gap.
3. Middle relievers are seeing back‑to‑back appearances. Jake Larkin threw 1.2 innings on Monday, then was back on the mound Thursday with only two days of rest.

In plain language, the more you ask a pitcher to do, the less reliable he becomes when the game is on the line.

Why Relievers Matter

Relief pitchers aren’t just “extra arms” – they’re the glue that holds a game together after the starter exits. Their job is to keep the opposition’s batting average low and to preserve the lead (or keep the deficit manageable). When a manager overworks a reliever, the pitch velocity can drop, command wavers, and the dreaded “wild pitch” becomes more likely.

I remember watching the 2016 World Series when the Cubs finally broke the curse. Their bullpen was a well‑rested, well‑rotated unit, and you could see the confidence in every fastball. Contrast that with a recent game where a tired reliever threw a 92‑mph fastball that barely crossed the plate – the batter took it for a home run, and the crowd’s roar turned into a collective sigh.

The Manager’s Playbook: Adjusting the Rotation

So, what can a manager do when the bullpen is stretched thin? Here are three practical adjustments that have worked for other clubs and could be a roadmap for Chicago.

1. Embrace a “Bullpen Day”

Instead of forcing a starter to go deep into the game, schedule a day where the bullpen handles the bulk of innings. This gives relievers a chance to work multiple innings in a low‑pressure environment, building stamina without the stress of a tight score. The 2022 Mets used this tactic during a stretch of back‑to‑back road games and saw a 15% drop in bullpen ERA.

2. Expand the “Middle‑Relief” Corps

Don’t rely solely on the traditional three‑man setup (setup man, closer, one middle reliever). Add a fourth arm who can eat an inning or two, especially in games that go into extra innings. A fresh arm can be the difference between a 9‑6 loss and a 9‑8 win.

3. Use Data‑Driven Matchups

Modern analytics can tell you which reliever performs best against left‑handed power hitters versus right‑handed contact hitters. Instead of defaulting to the “biggest arm,” plug the right pitcher into the right situation. The Cubs have a trove of Statcast data that can be mined for these insights – it’s just a matter of putting it to work.

Fans, What You Can Take Away

As a fan, you’re often the one yelling “Bring in the closer!” from the stands, but the reality is more nuanced. Here’s how you can stay savvy:

• Watch the innings count. If a reliever has already thrown more than 2.5 innings, the odds of a slip‑up increase.
• Notice the rest days. A pitcher coming back after just one day of rest is more likely to miss his spots.
• Read the manager’s cues. When you see a pitcher warming up earlier than usual, it often signals a strategic shift, not just a reaction to the current score.

Understanding these subtleties can turn a casual fan into a knowledgeable one, and it makes the game that much richer.

The Bottom Line

The Cubs’ bullpen usage this season is a cautionary tale about the perils of over‑reliance on a few arms. By spreading the workload, incorporating data‑driven matchups, and giving relievers the rest they need, a manager can protect both the short‑term win column and the long‑term health of his staff. For fans, recognizing the signs of fatigue and strategic adjustments adds a layer of appreciation that goes beyond the final score.

The next time you’re at Wrigley and the manager signals for a fresh arm, remember: it’s not just about who throws the hardest, but who can stay sharp when the game’s on the line.