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MLB pitcher outs props: how deep will the starter go?

A pitcher outs prop asks whether a starting pitcher records more or fewer outs than a set line, such as 17.5. Each inning has three outs, so 17.5 means the over needs six full innings.

Reviewed Oct 15, 2026

Answer first

90s
  1. 01Three outs equal one inning.
  2. 0217.5 outs means six innings for the over.
  3. 03Pitch counts and hooks decide most bets.

Key numbers

Outs props at a glance

17.5Common lineGood starter
3Outs per inningAlways
95Typical pitch countStarter limit
-115Typical priceOver side

In short

Key takeaways

  • Each out counts once, however it happens.
  • Managers pull starters early more often now.
  • Pitch count matters more than runs.
  • The pitcher must start for action.

Progress

How outs add up

  1. 1

    First pitch

    Bet has action

  2. 2

    Each out

    Strikeout, ground or fly

  3. 3

    Double play

    Two outs

  4. 4

    Pulled

    Count stops

  5. 5

    Final count

    Bet graded

Official MLB stats settle the bet.

Outs and innings

Outs lineInnings for overShown as
14.55 innings5.0
15.55 1/3 innings5.1
16.55 2/3 innings5.2
17.56 innings6.0
18.56 1/3 innings6.1

Box scores show 5.1 for 5 1/3 innings, 5.2 for 5 2/3.

How the line is set

Books look at how deep a pitcher usually goes, his pitches per inning and how quickly his manager pulls starters. An ace who averages 15 pitches per inning can reach six innings in about 90 pitches.

The opponent matters. Patient lineups that foul off pitches and draw walks raise pitch counts and shorten outings.

The game script matters too. A pitcher who gives up four runs early may be pulled in the third, while one with a big lead may be left in to save the bullpen.

Pitches per inning and expected depth

Pitches/inning90 pitches100 pitches
146.4 inn (19 outs)7.1 inn (21 outs)
165.6 inn (17 outs)6.3 inn (19 outs)
185.0 inn (15 outs)5.6 inn (17 outs)

Our own rough sums, ignoring early hooks.

Times through the order

Many teams avoid letting a starter face the lineup a third time, since hitters do better on later looks. That keeps many starters near 15 to 18 outs.

Openers and bulk relievers change everything. If a team uses an opener, books may not offer an outs prop, or the line may be very low.

Injuries and rain delays end outings fast. A long rain delay often means the starter does not return, which is a big risk for the over.

Sequence

Checking an outs prop

  1. Step 01

    Check recent depth

    Outs per start.

  2. Step 02

    Look at pitch counts

    Limits and trends.

  3. Step 03

    Review the lineup

    Patient or aggressive.

  4. Step 04

    Check the weather

    Rain delay risk.

  5. Step 05

    Compare lines

    Half an out matters.

Rules and settlement

Most books need the listed pitcher to start and throw at least one pitch for action. If another pitcher starts, the bet is usually void.

Every out counts the same. A strikeout, a ground out and a caught stealing while he pitches all add one out; a double play adds two.

If a game is shortened by rain, rules differ, so check whether the book needs the game to be official or the pitcher to be pulled first.

Floor rules

Outs terms

Know before you sit

Outs recorded
Outs made while he pitches.
Hook
Manager pulls the pitcher.
Opener
Reliever who starts the game.
Pitch count
Pitches thrown so far.

A worked example

A starter has an outs line of 16.5 at -120 over. He averages 5.2 innings, or 17 outs, and throws about 16 pitches per inning with a 95-pitch limit.

He finishes the sixth inning at 92 pitches and is pulled. That is 18 outs, so the over wins. A $12 bet at -120 returns $22, a profit of $10.

If a 30-pitch third inning had pushed him to 80 pitches after four, he likely would have been pulled near 14 or 15 outs, and the under would win.

Common mistakes

Counting innings wrong
5.2 is 17 outs.
Ignoring pitch counts
Limits cap outs.
Forgetting openers
Lines may be void.
Skipping weather
Rain ends starts.

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01Basics

What is a pitcher outs prop?

A bet on whether a starting pitcher records more or fewer outs than the line the sportsbook sets for that game.

How do outs relate to innings?

Each inning has three outs, so 18 outs is 6 innings. A line of 17.5 needs six full innings for the over.

What does 5.2 innings mean?

It means five innings plus two outs, which is 17 outs in total, not five and two tenths.

02Rules

What if a different pitcher starts?

Most books void the bet if the listed pitcher does not start, so your stake is returned.

Does a double play count as two outs?

Yes. Both outs are recorded while he is pitching, so a double play adds two outs to his total.

What about rain delays?

If he is pulled after a delay the bet usually stands; if the game is called early, rules vary by book.

03Strategy

Why do starters go shorter now?

Teams use bullpens more and avoid a third time through the order, so many starters stop at 15 to 18 outs.

Does the lineup matter?

Yes. Patient lineups raise pitch counts, which usually cuts a pitcher’s outs total.

Where can I get help?

If betting stops being fun, call or text 1-800-GAMBLER for free, private help any time of day.

Sources

  1. MLB — Official rules Not from a registry (Reference source, not an official registry) · accessed Oct 15, 2026Scoring rules and stat definitions
  2. Baseball Reference — MLB stats Not from a registry (Reference source, not an official registry) · accessed Oct 15, 2026League and player statistics
  3. Wizard of Odds — Sports betting Not from a registry (Reference source, not an official registry) · accessed Oct 15, 2026Sports betting math
  4. National Council on Problem Gambling — Help and resources Not from a registry (Reference source, not an official registry) · accessed Oct 15, 2026Free, confidential help: call or text 1-800-GAMBLER