Rays vs Tigers Prediction, August 24, 2026 | Under 6.5
Drew Rasmussen vs Framber Valdez at Comerica Park
Published August 24, 2026 · MLB Prediction Data Lab
The posted total is 6.5. A naive add of season run rates (4.51 for Rays, 4.49 for Tigers) gets you 9.00 combined runs. That is not the bet. The bet is that Drew Rasmussen and Framber Valdez plus Comerica Park pull the night below that baseline. Partitioning each starter's own earned-run rate across expected innings and handing the remainder to each club's season staff rate returns 7.34 projected earned runs.
Full slate: MLB picks today, August 24, 2026.
The listed matchup
Tampa Bay Rays (78–53) at Detroit Tigers (61–70), Comerica Park, Detroit. Drew Rasmussen, a right-hander, is listed for the visitors. Framber Valdez, a left-hander, is listed for the home club. Void the play if either listed starter is scratched. First-pitch weather listed 74°F, Cloudy, wind 8 mph, Out To CF.
| Side | Listed starter | Record | Park |
|---|---|---|---|
| Rays | Drew Rasmussen | 78–53 | Comerica Park |
| Tigers | Framber Valdez | 61–70 | Open, grass |
The two starters, measured per batter faced
Rate statistics expressed per nine innings reward pitchers who work deep. Expressing them as a share of batters faced removes that distortion. Drew Rasmussen has faced 550 hitters. Framber Valdez has faced 639.
| Starter | BF | K% | BB% | K−BB | K/BB | Pitches/BF |
|---|---|---|---|---|---|---|
| Drew Rasmussen | 550 | 26.0 | 4.5 | 21.5 | 5.72 | 3.97 |
| Framber Valdez | 639 | 17.4 | 8.8 | 8.6 | 1.98 | 3.60 |
| Starter | W-L | ERA | IP | WHIP | K/9 | BB/9 | HR/9 | Opp AVG |
|---|---|---|---|---|---|---|---|---|
| Drew Rasmussen (R) | 14-5 | 2.95 | 140.1 | 0.93 | 9.17 | 1.60 | 0.83 | .204 |
| Framber Valdez (L) | 8-9 | 4.35 | 144.2 | 1.41 | 6.91 | 3.48 | 0.87 | .261 |
Drew Rasmussen sits at a 2.95 ERA with a 0.93 WHIP and 25 walks in 140.1 innings. Framber Valdez sits at a 4.35 ERA with a 1.41 WHIP and 56 walks in 144.2 innings. Walks stabilize faster than earned runs, so the walk column is the more trustworthy August reading.
Direction inside the season
Season aggregates hide the last month. These are the prior starts, excluding today's outing so the table does not leak a result into a published prediction.
| Drew Rasmussen — last starts | IP | ER | K | BB | H | HR | Pitches |
|---|---|---|---|---|---|---|---|
| 2026-07-26 | 7.0 | 0 | 9 | 1 | 1 | — | 87 |
| 2026-08-01 | 6.0 | 0 | 10 | 1 | 4 | — | 96 |
| 2026-08-07 | 7.0 | 0 | 8 | 2 | 2 | — | 91 |
| 2026-08-12 | 5.0 | 2 | 3 | 1 | 4 | — | 84 |
| 2026-08-19 | 5.0 | 5 | 5 | 2 | 7 | 1 | 86 |
| Framber Valdez — last starts | IP | ER | K | BB | H | HR | Pitches |
|---|---|---|---|---|---|---|---|
| 2026-07-26 | 5.0 | 2 | 4 | 3 | 4 | 1 | 97 |
| 2026-08-01 | 7.0 | 2 | 6 | 2 | 9 | — | 96 |
| 2026-08-06 | 7.0 | 0 | 5 | 2 | 5 | — | 95 |
| 2026-08-12 | 5.2 | 4 | 3 | 5 | 6 | 1 | 102 |
| 2026-08-17 | 5.2 | 4 | 5 | 4 | 5 | — | 91 |
The run environment, before the starters
Rays have scored 591 runs in 131 games (4.51 per game) with a .735 OPS. Tigers have scored 588 in 131 (4.49) with a .721 OPS. The pitching staffs have allowed 4.15 and 3.95 runs per game.
| Club | Record | R/G | OPS | Staff ERA | Staff WHIP | RA/G |
|---|---|---|---|---|---|---|
| Rays | 78–53 | 4.51 | .735 | 3.81 | 1.16 | 4.15 |
| Tigers | 61–70 | 4.49 | .721 | 3.61 | 1.22 | 3.95 |
Reassembling the buckets
Drew Rasmussen averages 5.61 innings per start. Framber Valdez averages 5.56. Weight each starter's own earned run average across that length, then hand the remainder of the nine innings to his club's season staff rate. That is a conservative relief proxy — it mixes rotation and bullpen — and it is stated as a limitation, not hidden.
| Side | Starter IP | Starter ERA | Relief IP | Staff ERA | Projected ER |
|---|---|---|---|---|---|
| Rays (Drew Rasmussen) | 5.61 | 2.95 | 3.39 | 3.81 | 3.27 |
| Tigers (Framber Valdez) | 5.56 | 4.35 | 3.44 | 3.61 | 4.07 |
| Combined | 7.34 |
A combined 7.34 projected earned runs against a 6.5 total. Unearned runs are ignored. Neither starter hits his average length every night. The opposing lineups are not in the formula; they sit in the table above.
The park
Comerica Park is listed at 345 feet to left, 370 feet to left center, 420 feet to center, 365 feet to right center, 330 feet to right, on grass, open at 600 feet above sea level with a listed capacity of 41,083. Park dimensions do not decide a total by themselves. They decide whether a walk plus a ball in the air becomes two runs or a long out.
Where this reading is weakest
The season run rates do not want this number. Combined they sit at 9.00 against a 6.5 total, a gap of 2.50 runs that the starters and the park have to close. Framber Valdez also allows 0.87 home runs per nine, and one three-run ball turns a low-event night into a push or a loss.
What would falsify it
A start from either pitcher that ends before the fifth with a pitch count above 95, or a walk total of four-plus from Framber Valdez, is the cleanest failure signal. That is how a 6.5 total gets away: free baserunners, an early bullpen, and a second time through a lineup that already scores 4.51 runs a night on the higher side.
The position
Tigers/Rays Under 6.5 at -110, 1 units. A price of -110 implies a 52.4% break-even. Grade it against this published number. If a listed starter is scratched, the play is void.
- Tigers/Rays Under 6.5 -110 · 1u
Who is on the mound?
Drew Rasmussen for Rays. Framber Valdez for Tigers. Those names come from the MLB probable-pitcher feed, not from a guessed rotation.
Why use batters-faced rates instead of ERA?
Earned run average is a counting result. Strikeout and walk rates as a share of batters faced describe the process that produced it, and they stabilize on a smaller sample. Drew Rasmussen at 21.5 points of K−BB separation versus Framber Valdez at 8.6 is the comparison ERA hides.
How is the pick graded?
Against the published price, on the public record. Pending is not a win. Today's full card lives at a stable URL: mlb-picks.html.
Pick, odds, and unit size come from the BetLegend daily tracker. Probable starters, season rates, and venue facts are from the MLB Stats API. Educational analysis. 18+ only. 1-800-GAMBLER.