Marcus Semien's total bases props have been a goldmine for under bettors, hitting just 37.5% of overs across 32 games with a devastating -0.6 differential below the typical 2.22 line. The under delivers +19.3% ROI while overs bleed -28.4%, creating a clear lean under opportunity.
Expert Analysis
Semien's total bases struggles stem from a fundamental mismatch between market expectations and his actual production profile. Averaging just 1.59 total bases against a 2.22 line reveals oddsmakers are pricing him like a premium power threat when his recent data suggests otherwise. The 12-20 over/under record isn't just bad luck—it reflects a systematic overvaluation of his multi-hit and extra-base potential. His longest under streak of seven games demonstrates the persistence of this trend, while the modest three-game over streak shows limited upside volatility. The -0.6 differential is particularly damaging because it consistently puts under bettors in profitable territory even on pushes. This pattern suggests Semien is either dealing with underlying performance issues, facing tougher pitching matchups than expected, or simply regressing from inflated historical numbers that bookmakers haven't fully adjusted for. The 19.3% ROI on unders indicates sharp money has likely identified this edge, but recreational action continues inflating the lines. Without significant changes to his approach or health status, this trend appears sustainable given the sample size and consistency of underperformance.
Betting Verdict
LEAN UNDER with MEDIUM confidence. Semien's total bases props offer legitimate value on the under side, backed by a strong 62.5% hit rate and positive ROI. The ideal spot is when his line sits at 2.0 or higher, maximizing the gap between expectation and reality. Main risk is a hot streak erasing recent gains, but the data suggests betting unders until the market properly adjusts his baseline expectations.
Performance vs Line
Game Log (Last 15 Games)
| Date | Opp | Line | Actual | +/- | Result |
|---|---|---|---|---|---|
| 2024-09-29 | OPP | 1.5 | 1.0 | -0.5 | UNDER |
| 2024-09-27 | OPP | 3.5 | 6.0 | +2.5 | OVER |
| 2024-09-05 | OPP | 1.5 | 2.0 | +0.5 | OVER |
| 2024-09-02 | OPP | 2.5 | 0.0 | -2.5 | UNDER |
| 2024-08-30 | OPP | 2.5 | 0.0 | -2.5 | UNDER |
| 2024-08-13 | OPP | 1.5 | 2.0 | +0.5 | OVER |
| 2024-08-11 | OPP | 2.5 | 0.0 | -2.5 | UNDER |
| 2024-08-06 | OPP | 1.5 | 0.0 | -1.5 | UNDER |
| 2024-08-04 | OPP | 4.5 | 0.0 | -4.5 | UNDER |
| 2024-08-02 | OPP | 3.5 | 4.0 | +0.5 | OVER |
| 2024-07-30 | OPP | 4.5 | 0.0 | -4.5 | UNDER |
| 2024-07-29 | OPP | 3.5 | 2.0 | -1.5 | UNDER |
| 2024-07-27 | OPP | 2.5 | 3.0 | +0.5 | OVER |
| 2024-07-23 | OPP | 2.5 | 2.0 | -0.5 | UNDER |
| 2024-07-22 | OPP | 2.5 | 4.0 | +1.5 | OVER |
Key Splits
Home vs Away
Favorite vs Underdog
Recent Trend
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Compare SportsbooksFrequently Asked Questions
What is Marcus Semien's Total Bases prop record all games?
Semien's total bases record stands at 12-20 over/under across 32 games, hitting just 37.5% of overs. He averages 1.59 total bases against typical lines around 2.22, creating a significant -0.6 differential that consistently favors under bettors.
Should I bet OVER or UNDER on Marcus Semien Total Bases all games?
Bet under on Semien's total bases props. The data strongly supports this with a 62.5% hit rate and +19.3% ROI on unders. His consistent underperformance relative to market expectations creates legitimate betting value on the under side.
What's Marcus Semien's average Total Bases all games?
Semien averages 1.59 total bases per game against lines typically set around 2.22. This -0.6 differential below the betting line represents significant underperformance and creates the foundation for profitable under betting opportunities in his total bases market.
How reliable is this trend?
Target Semien total bases unders when his line is 2.0 or higher, maximizing the value gap. Avoid after his rare hot streaks of 2-3 games, and focus on spots following under runs where the market hasn't adjusted expectations downward.