What Lineup Dropper is

The wire

Lineup Dropper is a news wire for MLB batting orders. When a team publishes its official lineup, the tool compares it against the projected lineup the market priced its player props off, and puts the differences in front of you while the books are still catching up. When a team later amends that lineup, the amendment is compared against the previous official version instead, so an hour-old change never gets replayed as news.

It reports what changed and what that change touches. It does not model a hitter and it does not tell you a bet is good.

Open Lineup Dropper and you land on the newest lineup on the board rather than on a list. The day's slate sits in a rail on the left: Dropped at the top, newest first, On deck for the games still waiting, and Started at the foot. A lineup retires to Started at first pitch, because that is when sportsbooks pull the pre-game props it was priced against, and a Started row does not open.

Before the day's first lineup posts, the same page is a waiting room: the next game to start, a countdown to its first pitch, the rest of the day's schedule, and the switch for lineup alerts.

Movers

A lineup that matches its projection is not news. What the tool shows is the difference, and each batter on the wrong side of it is a mover:

• A slot change is a batter batting somewhere other than where he was projected, or where he batted in the previous version.
• An unprojected start is a batter who is playing and was not in the projection at all.
• A projected scratch is a batter who was projected and is not playing.

Movers are ordered by how much the change moved their expected workload, biggest first, so the change worth reading leads whatever slot it happened in.

What a slot is worth

A slot change carries a plate-appearance delta: batting leadoff is worth roughly 4.65 expected trips to the plate over a game and batting ninth roughly 3.82, so moving up raises expected volume and moving down lowers it. Where the simulation described in the model read has run this game, those league-average numbers are replaced slot by slot with ones that know about this park and this starter. Nothing about the row changes; the arithmetic behind it is just better.

That delta signs the markets that live on volume: total bases, hits, hits plus runs plus RBIs, and singles. More trips to the plate argues over, fewer argues under.

Two markets never get a side from a slot change. RBIs and runs are marked watch, because they depend on the eight other batters in the order as much as on the batter himself: moving up gains plate appearances and loses runners on base ahead of him, and moving down does the reverse. The two pull against each other, so the row states the swing and leaves both sides open. A watch market can later be signed by the simulation, which is the subject of the model read.

Opening a market

Selecting one of a mover's markets slides in a bet detail panel beside the movers list. It carries both sides of the line:

• A side switch at the top, Over and Under, each labelled with the best price your own selected sportsbooks are posting on that side. It opens on the side the change argues for, and a side no book is posting reads "not posted".
• A drop-window chart opening five minutes before the drop and running to now, with a dashed marker on the drop itself. Each of your line-history books draws its own line, so you can see which books repriced within seconds and which are still holding a pre-drop number. A book that has not moved draws flat rather than disappearing.
• A Bets list underneath: your selected sportsbooks' current prices for the shown side, one row per book, best price first. Nothing is badged "best"; the order says it. Each row links straight to that book's slip for that selection.
• Beside those book prices, where the simulation has one, a Ballpark Pal fair price for exactly this line. It is reference rather than an offer, so it never sits in the ranked list. See the model read.

Each row also ends in a take, which records the bet in your tracker as a Lineup Dropper wager, along with the drop that argued for it, so you can review that kind of bet on its own later.

Prices in the panel keep polling while it is open. A market that stops being posted closes the panel rather than leaving a stale price on screen.

Alerts

Lineup alerts are one push per drop, for every official lineup and every amendment on top of it. They are opt-in and off by default, and they say what happened rather than what to bet. The switch is on the waiting room's next-up card before the first drop and at the foot of the slate rail after it; on a phone there is also a bell in the terminal footer. Pricing is never on the alert's path, so the push is not waiting for odds to be gathered before it reaches you.

Access

Lineup Dropper is invite-only. One six-character access code opens it on your account, free for the rest of the season. A code is not a plan and not a trial: it opens Lineup Dropper and nothing else, and Premium opens everything else and not this. Codes are handed out by DM on X to readers who follow and repost.

For everything Ballpark Pal's game simulation adds to a drop, see The model read.