MLB prop odds move when lineups are confirmed, usually a few hours before first pitch. A hitter moved up to leadoff gets more plate appearances, a late scratch takes his props off the board, and a change of starting pitcher or a wind and weather forecast moves strikeout, hits and home run prices across the game. The board lists the props that moved most in the last hour and the book that moved first on each.
+5.3 pts
Over implied probability 45.9% → 51.2%
Shortening
Moved first:
1xBet
7:01 PM ET
· 3 books followed
| Book | Line | Then | Now | Prob. change |
|---|---|---|---|---|
| 1xBet |
0.5 | +11845.9%46¢ | -10551.2%51¢ | +5.3 pts |
 Fanatics Sportsbook |
0.5 | +12045.5%45¢ | +11546.5%47¢ | +1.1 pts |
 Polymarket |
0.5 | +13342.9%43¢ | +12744.1%44¢ | +1.1 pts |
 BetRivers |
0.5 | +10050%50¢ | -10451%51¢ | +1.0 pts |
+4.3 pts
Over implied probability 28.5% → 32.8%
Shortening
Moved first:
1xBet
7:01 PM ET
· 1 book followed
| Book | Line | Then | Now | Prob. change |
|---|---|---|---|---|
| 1xBet |
0.5 | +25128.5%28¢ | +20532.8%33¢ | +4.3 pts |
 ProphetX |
0.5 | +25528.2%28¢ | +23030.3%30¢ | +2.1 pts |
-4.3 pts
Over implied probability 55.6% → 51.2%
Drifting
Moved first: Sportzino 6:58 PM ET · 2 books followed
| Book | Line | Then | Now | Prob. change |
|---|---|---|---|---|
| 1xBet |
0.5 | -12555.6%56¢ | -10551.2%51¢ | -4.3 pts |
| Polymarket |
0.5 | -10050%50¢ | -11353.1%53¢ | +3.1 pts |
 Novig |
0.5 | -10250.5%50¢ | -11553.5%53¢ | +3.0 pts |
| ProphetX |
0.5 | -10250.5%50¢ | -11152.6%53¢ | +2.1 pts |
| Fanatics Sportsbook |
0.5 | -13056.5%57¢ | -12054.5%55¢ | -2.0 pts |
| Sportzino | 0.5 | -10551.2%51¢ | +10050%50¢ | -1.2 pts |
Free accounts see a 3-move sample from below the top of the board. Premium unlocks every move, every book, and the window, market, direction and steam filters.
Go PremiumEach row is one player and market at its main line, the line most sportsbooks are quoting. For each book, BeatVig compares the Over price it shows now on that line with the price it showed when the window opened, and shows the Over's implied probability then and now. The change is in percentage points of implied probability, so a move at -110 and a move at +300 are measured on the same scale, and a negative change means the market now thinks the Over is less likely. Shortening means the Over pays less than it did, and drifting means it pays more. If a book moved onto or off the main line, the direction comes from the line: a higher Over line means the market is leaning toward the Over. Alternate lines, quotes a book had not touched for more than a day, and moves smaller than half a point are left out.
The first mover is the earliest book in the window to move in the row's direction, and "followed" counts the other books that moved the same way. Steam is the odds feed's own label for a fast, sharp repricing; BeatVig shows it as reported and does not infer it from the size of a move. Only props on games that have not started are included.
When lineups are posted, a few hours before first pitch, and when a starting pitcher is changed. Batting order, platoon matchups and weather such as wind at the ballpark all change how many chances a hitter gets.
Yes. A lineup with more strikeout-prone hitters, or a different starting pitcher than expected, moves strikeout props. The board shows each book's strikeout price at the start of the window and now.
240 MLB player props moved in the last hour, and the biggest move was a 13.2-point rise in Over probability.
