The complete guide to researching MLB player props

Baseball props are built on a long season and a daily schedule. Teams play almost every day, so there's more data than in any other sport, and more noise too. A great hitter goes 0-for-4 all the time. A great pitcher gets knocked out in the third. Research is how you separate the role and the matchup from the randomness.

This guide covers the two sides of MLB props, hitters and pitchers: what drives each market, what changes a read on the day, and how to check the price. None of it turns a prop into a sure thing. It gives you a routine you can repeat every day of the season.

Step 1: Know the markets

A player prop is a bet on one player's stat line. The common MLB markets:

• Hitters: hits, total bases, home runs, RBIs, runs, walks, stolen bases and the combined hits + runs + RBIs.
• Pitchers: strikeouts, outs recorded, hits allowed, earned runs and walks allowed.

Most hitter props sit at low numbers, like over 0.5 hits or over 1.5 total bases, and the price carries most of the information. That makes the breakeven win rate especially important. A hit prop at -250 needs to cash about 71% of the time. A home run at +350 needs about 22%. The breakeven calculator converts any price.

Step 2: Read hit rates with the low lines in mind

A hit rate shows how often a player cleared a line in his recent games. In baseball, low lines produce high hit rates almost automatically. A good hitter clears 0.5 hits in most games, and the book prices it that way.

So the useful question is how the hit rate compares with the price, not how high it is. If a hitter cleared 0.5 hits in 8 of his last 10 and the price implies 72%, the hit rate and the market roughly agree. You need a reason to think the real chance is higher.

Read last 10 for the pattern and last 5 for the trend. Our answer on L10 vs L5 explains how to weigh them, and what a 10-for-10 hit rate tells you covers why perfect streaks on low lines say less than they seem to. Free MLB hit rates for every tracked hitter and pitcher are on the MLB hit-rate page.

Step 3: Confirm the lineup and the starter

Two things change every MLB prop on the day:

• The batting order. A leadoff hitter gets more plate appearances than a seventh hitter, and more plate appearances means more chances for hits, runs and total bases. A day off, a pinch-hit role or a drop in the order changes everything.
• The starting pitcher. The probable starters list isn't always right. The DARIMARKET board confirms starters from posted lineups before plays go up, and it skips anything it can't verify. Your prop research should do the same.

Lineups usually post a few hours before first pitch. A read made in the morning deserves one more look once they're out.

Step 4: Hitter props are about the pitcher

Once the lineup is set, the opposing pitcher is the biggest factor for any hitter prop:

• Strikeout rate. A high-strikeout pitcher cuts into hits and total bases for everyone.
• Contact quality allowed. Some pitchers give up hard contact and home runs. Others keep the ball on the ground.
• Handedness. Many hitters perform differently against right-handed and left-handed pitching. If a lefty is starting, the matchup can look very different from a hitter's season line.
• The bullpen. Starters rarely go the whole game. A tired or weak bullpen gives hitters more chances late.

Members see what the opponent allows to hitters per game, in hits and total bases, with a league rank, on each player's hit-rate page.

Step 5: Pitcher props start with pitch count

For pitchers, volume matters as much as skill:

• Strikeouts depend on the pitcher's strikeout rate, the opposing lineup's strikeout tendency and how deep he goes.
• Outs recorded depend mostly on how long his manager lets him pitch. Pitch-count limits, a recent long outing and bullpen plans all matter.
• Hits and earned runs allowed depend on the opposing lineup and the park.

Check recent workloads. A pitcher coming off injury or on a limit can be pulled early no matter how well he's throwing, and that sinks overs on strikeouts and outs. Watch for openers too, where a reliever starts and pitches only an inning or two.

Step 6: Park and weather

Baseball is the one major sport where the field itself changes the numbers:

• Parks. Some ballparks favor hitters, with short fences or thin air. Others suppress home runs.
• Wind. Wind blowing out raises power numbers. Wind blowing in cuts them.
• Temperature. The ball tends to carry farther in heat than in cold.
• Roofs. A closed roof takes weather off the table.

The DARIMARKET MLB board checks weather and park factors on every game total, and the same inputs matter for home run and total bases props.

Step 7: Check the price and the movement

Once you have a view, convert the price to implied probability and compare. If your estimate isn't higher, pass.

Then watch line movement. A lineup card, a scratch or a weather update can move props fast. If the number already moved on the news you were counting on, the edge may be gone. The odds converter helps when you compare alt lines like 2+ hits or 6+ strikeouts.

Price matters more in baseball than people think, because so many props are juiced favorites. Shopping between FanDuel and DraftKings, when you have both, can lower your breakeven. Our read on line shopping shows how much a few cents is worth.

Step 8: Parlays and correlation

Hitter props stack naturally: a leadoff hitter's runs and the next hitter's RBIs, or a pitcher's strikeouts and the opposing team's low total. Books price that correlation into same-game parlays, so the obvious stacks rarely carry the edge they seem to. Parlay math explains why, the parlay calculator shows the combined price, and the free parlay checker puts every leg's last 10, last 5 and home/road numbers side by side.

A simple MLB day

• Scan today's hit rates for lines where the hit rate looks stronger than the price.
• Wait for posted lineups and confirm the starting pitchers.
• Check the pitcher matchup, handedness and the bullpen.
• Check the park and the weather.
• Compare your view with the price, and size it in units.

The MLB season runs from late March through the World Series, so this routine gets a lot of reps. If you follow certain players, a player watchlist sends a game-day email with their lines. The MLB hub has the board and free picks, and every free calculator is on the tools page.

The short version

Lineup and starter first, then the pitcher matchup, then park and weather, then the price. Low lines make hit rates look better than they are, so always compare the hit rate with what the price implies. Baseball is a long season, and one game tells you very little. Read up on recency bias before a hot week talks you into something.

21+. Research and commentary, not betting advice. If betting stops being fun, call or text 1-800-MY-RESET (1-800-697-3738).