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Over 36 logged MLB games, Riley O'Brien has gone over 0.5 hits allowed 18 times (50%), and over their last 10 they have done it 7 times (70%). They average 0.8 hits allowed across those 36 games. Their last 5 average 1.0, 33% above their 0.8 across the full log. These are measured box-score results from St. Louis Cardinals games, not a projection, and on their own they say nothing about whether tonight’s price is worth taking.
| Market | Logged games | Average | Most balanced line | Hit rate there |
|---|---|---|---|---|
| Strikeouts | 36 | 0.9 strikeouts | Over 0.5 | 24 of 36 (67%) |
| Hits Allowed | 36 | 0.8 hits allowed | Over 0.5 | 18 of 36 (50%) |
Every market Riley O'Brien is currently priced in, on the same row as the game it came from. A dash means the box score carried no value in that market for that game, which is not the same as a zero.
| Date | Opponent | Venue | Strikeouts | Hits Allowed |
|---|---|---|---|---|
| 2026-09-20 | Washington Nationals | Home | 0 | 0 |
| 2026-09-19 | Washington Nationals | Home | 2 | 1 |
| 2026-09-16 | San Francisco Giants | Home | 0 | 2 |
| 2026-09-14 | San Francisco Giants | Home | 2 | 1 |
| 2026-09-12 | Chicago White Sox | Home | 2 | 1 |
| 2026-09-11 | Chicago White Sox | Home | 1 | 0 |
| 2026-09-07 | San Francisco Giants | Away | 0 | 1 |
| 2026-09-04 | Colorado Rockies | Away | 2 | 1 |
| 2026-09-03 | Los Angeles Dodgers | Away | 0 | 2 |
| 2026-09-02 | Los Angeles Dodgers | Away | 1 | 0 |
| 2026-08-27 | Baltimore Orioles | Home | 1 | 1 |
| 2026-08-26 | Baltimore Orioles | Home | 0 | 2 |
| 2026-08-23 | Philadelphia Phillies | Away | 0 | 5 |
| 2026-08-20 | Cincinnati Reds | Away | 0 | 1 |
| 2026-08-18 | Cincinnati Reds | Away | 1 | 0 |
| 2026-08-17 | Cincinnati Reds | Away | 3 | 0 |
Counted from the same 36 logged games as the tables above. Measured history, not a projection and not a read on tonight's price.
| Percentile | Hits Allowed |
|---|---|
| Lowest logged game | 0 |
| 25th percentile | 0 |
| Median | 0 |
| 75th percentile | 1 |
| Highest logged game | 5 |
30 of 36 games (83%) landed between 0 and 1; 36 (100%) finished at or above the 0 median, and the spread from 0 to 5 is the whole range of the log. Nearest-rank, so every figure is a score Riley O'Brien actually recorded.
| Month | Logged games | Average |
|---|---|---|
| September 2026 | 10 | 0.9 |
| August 2026 | 12 | 0.8 |
| July 2026 | 10 | 0.5 |
| June 2026 | 4 | 0.8 |
| Gap | Logged games | Average |
|---|---|---|
| 1 day | 9 | 0.6 |
| 2 days | 10 | 0.5 |
| 3 to 4 days | 13 | 1.2 |
| 5 or more days | 3 | 0 |
The gap is the distance to the previous game in this log, not a rest figure — a box score does not record a game a player sat out inside it.
| Opponent | Logged games | Average | Best |
|---|---|---|---|
| Chicago Cubs | 4 | 0 | 0 |
| San Francisco Giants | 3 | 1.3 | 2 |
| Colorado Rockies | 3 | 0.3 | 1 |
| Cincinnati Reds | 3 | 0.3 | 1 |
| Atlanta Braves | 3 | 0.3 | 1 |
| Philadelphia Phillies | 2 | 2.5 | 5 |
Most-faced in this log is Chicago Cubs, 4 games at 0, best of 0. Counts sit beside every average because two meetings is a low bar; opponents faced once are left out.
Riley O'Brien has gone over 0.5 strikeouts in 24 of 36 logged games (67%).
At home they average 0.9 over 19 games; away, 0.9 over 17.
Riley O'Brien strikeouts: full game log, trend and hit rate by line
Riley O'Brien has gone over 0.5 hits allowed in 18 of 36 logged games (50%).
At home they average 0.5 over 19 games; away, 1.0 over 17.
Riley O'Brien hits allowed: full game log, trend and hit rate by line
Prop history for Riley O'Brien of the St. Louis Cardinals. What follows is the record in Strikeouts and Hits Allowed: how often they have finished above each line their own game log supports, what their average looks like at home and away, and how much they have moved lately against their own baseline. Every figure is counted from official MLB box scores, one row per game they actually played, and rebuilt daily. None of it is a forecast, and none of it is compared with a price. When the live board carries a line for this player, it appears at the top of this page.
Calculated by the ParlayBuilder Prop Engine.
Every figure on this page is counted from official MLB box scores, one row per game actually played. No projections, and a game the player missed is absent rather than scored as a zero. Where a hit rate is compared with the live price, it is first pulled toward that price in proportion to how thin the sample is, so three-for-three does not read here as a certainty.
Past performance does not predict future results, and Parlay Builder does not accept wagers, hold funds or settle bets. No locks and no guaranteed wins. This is measured history and a price, and what you do with them is your decision.
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This page keeps the measured history. When the live board carries a line for Riley O'Brien, it appears at the top of this page, and the address does not change, so a bookmark or a link keeps working.
How often they finished above each line their own distribution supports, over all their logged games and over the last ten and five, with the game count printed beside every rate. A percentage without a denominator is not a measurement, so none appears here without one.
No. It is a record of games that have been played, and it is not compared with any price. Past performance does not predict future results, and Parlay Builder does not accept wagers, hold funds or settle bets.
How MLB prop markets behave, measured across the league
Odds and lines come from licensed data feeds and refresh on a schedule; hit rates and grades are Parlay Builder’s own calculations.