A bullpen is a practice session throwing off a mound, and most young pitchers waste it by just chucking fastballs down the middle. To make one count: throw with a purpose (pick targets and work like it's an at-bat), aim for quality over quantity (fewer, better pitches beat a lot of sloppy ones), keep it low-stress so he's grooving command and mechanics, not showing off velocity, and protect the arm by counting bullpen throws as part of his workload. A good bullpen builds the habits that show up in games. A bad one just makes the arm tired.
The bullpen is where a pitcher actually gets better, or where he quietly practices his bad habits. It's his practice field: a chance to work on command and mechanics with no hitter, no scoreboard, no pressure. Yet most young pitchers treat a bullpen as a chance to grip it and rip it, firing fastballs down the middle to see how hard they can throw. That's a wasted session, and worse, it grooves the wrong stuff. Here's how to make a bullpen actually count.
“A bullpen isn't for throwing hard. It's for throwing on purpose.”
What he practices in the pen is what shows up in the game.Make every pitch have a purpose
The single biggest upgrade is simple: give every pitch a target and an intention. Instead of throwing at the catcher's chest, pick a spot, low and away, then up and in, and try to hit it. Even better, pretend there's a hitter and work a count. A pitcher who practices hitting spots and pitching to a plan in the pen is building the exact skill he needs in a game. A pitcher who just throws to the mitt is practicing throwing, not pitching. This is where command is actually built, the same skill our guide on throwing more strikes is all about.
Quality over quantity
More pitches is not a better bullpen. A focused 20-to-30 pitch session where he's dialed in and hitting spots does far more than 60 lazy ones, and it's easier on the arm. When he's tired and his mechanics get sloppy, every pitch after that is just grooving bad habits and adding wear. Better to stop while the reps are still good. And always try to end on a good pitch, so he walks off the mound with the right feeling.
Warm up first
Get the arm ready with catch and easy throws before climbing the mound. A bullpen is not the warm-up, it's the work.
Work with a plan
Pick targets, mix spots, maybe pretend to face a hitter and work counts. Every pitch has a job.
Stay under control
This is about command and clean mechanics, not max-effort velocity. Throw at a controlled effort where he can repeat his delivery.
End on a good one
Finish with a pitch he executes well, then stop. Quit while the reps are sharp, not after they've fallen apart.
It's not a radar-gun show
A bullpen is the wrong place to chase velocity. Max-effort throwing every pitch makes mechanics sloppy, tires the arm, and teaches a kid to muscle up instead of repeat a smooth delivery. The pitchers who get the most out of bullpens throw at a controlled effort and focus on repeating their motion and hitting their spots. Velocity is built through strength and clean mechanics over time, our guide on how to throw harder covers that, not by red-lining every bullpen.
| A productive bullpen | A wasted bullpen |
|---|---|
| Every pitch has a target and a purpose | Fastballs down the middle to the mitt |
| Controlled effort, repeatable mechanics | Max effort, grip it and rip it |
| Fewer, sharper pitches; ends on a good one | Too many pitches, ends when the arm is dead |
| Counts as part of the weekly workload | Extra throwing nobody's tracking |
Bullpens count as throwing
Here's the part families forget: a bullpen is real throwing, and it adds to a pitcher's workload just like a game does. Stacking bullpens on top of game innings without counting them is how arms get overworked. A young pitcher's total throwing, games plus bullpens plus practice, all has to fit inside sensible limits with real rest. Our guides on how often a youth pitcher should throw and pitch counts by age cover keeping the whole workload safe. Never trade a healthy arm for extra reps.
The bottom line
A bullpen is a pitcher's practice field, and it's only as good as the intention he brings to it. Throw with a purpose, hit spots, work like there's a hitter. Favor quality over quantity and end on a good pitch. Keep the effort controlled so he's grooving command and clean mechanics, not chasing radar readings. And count those pitches toward his workload so the practice doesn't cost him his arm. A good bullpen is where little things now become big numbers later.
A bullpen is exactly where mechanics get grooved, for better or worse, which makes it the perfect place to check what he's actually repeating. Film one pitch from the side during his next pen and upload it, and we'll break down his delivery frame by frame and show you whether he's grooving good habits or practicing the ones that cost him, so his bullpen work pays off.
See what his delivery is really grooving in the pen
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Start the Free Evaluation →Takes about 2 minutes · See a sample analysis firstCommon questions
How many pitches should a bullpen be for a youth pitcher?
There's no single number, but a focused bullpen of roughly 20 to 30 quality pitches is plenty for most young pitchers, and often better than a longer, sloppier one. The goal is sharp, purposeful reps, not volume. Stop when his mechanics start slipping or the arm gets tired, since pitches thrown fatigued just groove bad habits and add wear. Always count those pitches as part of his overall throwing workload.
How often should a young pitcher throw a bullpen?
It depends on his age, his game schedule, and his total throwing load, so there's no universal answer. The key is that bullpens count as real throwing and have to fit inside sensible weekly limits with adequate rest, alongside games and practice. Many youth pitchers do well with one focused bullpen between starts, but the right amount is whatever keeps his total workload safe. When in doubt, less is safer.
Should a pitcher throw max effort in a bullpen?
Generally no. A bullpen is for building command and repeating clean mechanics, which happens best at a controlled effort where he can actually repeat his delivery. Throwing max effort every pitch makes mechanics sloppy, tires the arm, and teaches a kid to muscle up rather than throw smooth. Velocity comes from strength and good mechanics over time, not from red-lining every practice session.
What should a young pitcher work on in a bullpen?
Command and clean, repeatable mechanics. Practically, that means giving every pitch a target, mixing spots, and even pretending to face a hitter and work a count, so he's practicing pitching, not just throwing. Working on hitting his spots at a controlled effort builds the exact skills that show up in games. Finishing on a well-executed pitch is a good habit too.
Do bullpen pitches count toward a pitch count?
They count toward a pitcher's overall throwing workload, which is what matters for arm health, even if they aren't counted in an official game pitch count. A bullpen is real throwing and adds stress to the arm just like a game does, so stacking bullpens on top of game innings without accounting for them can lead to overuse. Track the total, games plus bullpens plus practice, and keep it within sensible limits.
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