I told you I couldn’t quit Reid Detmers. I hope you listened.
His ERA at that time was 4.63 and I told you it was going to get better. 20 innings and only one solo HR later, the ERA is now 3.68. He is a legit Top 10 pitcher in fantasy baseball right now and the poster boy for paying attention to a key fantasy baseball statistical measure ERA-xERA.
Those gaps are wider than they've been in years among a handful of qualified starters, and if you're making pitching trade decisions based on surface ERA alone, you're the person on the wrong side of those deals. This piece exists to fix that — for you, and at the expense of the managers in your league who haven't caught up yet.
Here is the board. Here is the math. Move accordingly.
Reid Detmers Has a 3.68 ERA and a Top-10 xERA. Buy Before Your League Notices.
Why the ERA Is Misleading His Owners Right Now
Let's start with the buy, because the sell-high logic only works if you know what to buy into.
Reid Detmers is a top-10 starting pitcher in baseball right now. That sentence will cause cognitive dissonance in approximately 80 percent of your leagumates, and that gap is your competitive advantage.
In his three starts since the 4.63 ERA, he has given up one run in 20 innings. That’s a 0.45 ERA. He hasn’t walked a hitter in his last two games.
His ERA has suppressed his trade value all season, but the window is closing. His WAR is 2.8 through 15 starts.
His career history objection is a real factor. Detmers has historically run about three-quarters of a run of ERA-to-xERA penalty, driven in part by playing behind an Angels defense that has never been confused with the 1970s Orioles. Apply that full penalty to his current xERA and you're still projecting a mid-3.00s ERA from a pitcher with elite swing-and-miss stuff and four legitimate pitches. That's an SP2. You are currently acquiring him for an SP4's price.
The Sell-High Board: Three Starters Whose ERAs Are Writing Checks the Peripherals Won't Cash
USA TODAY Network via Reuters Connect


Eduardo Rodriguez: A Career-Best ERA Sitting on a Shaky Foundation
Eduardo Rodriguez has posted a 2.45 ERA through 15 starts for the Diamondbacks. His xERA is 4.90. That gap — nearly 2.5 full runs — is your sell-high window, and it is open right now.
The regression case here isn't about Rodriguez being a bad pitcher. He isn't. The case is about sequencing and strand rate propping up a number that his underlying contact quality doesn't support at this level. His FIP and ERA estimators have run consistently higher than his ERA all season.
Any manager who watches box scores and sees a 2.45 ERA thinks Rodriguez figured something out. He's available for full SP2 value right now. You are not required to agree with that assessment. Move him for a proven strikeout arm or a high-leverage closer, smile, and revisit this article in August.
Bruce Kluckhohn-Imagn Images
Michael McGreevy — The Cardinals' Most Convincing Illusion
Michael McGreevy's ERA is 2.99. His xERA is 5.61. That 2.62-run gap is one of the three largest in baseball among qualified starters.
Here's what's underneath it: his GB% has fallen from 64.6% in his 2024 debut to 44.7% in 2026, which means the ground-ball approach that kept the damage manageable as a rookie is no longer the foundation of his game. His Barrel% of 9.6% is above league average — in the wrong direction. His fastball velocity has dropped from 93.0 mph in 2025 to 91.5 mph in 2026. Baseball Savant's percentile rankings put him in just the 10th percentile for xERA among all pitchers tracked.
He does have a genuine skill — his K-BB% of approximately 10.4 percentage points shows he limits free passes. One real skill doesn't hold up a 2.99 ERA when your contact quality looks like this.
Randy Vasquez — The Worst ERA-to-xERA Gap in Baseball
Randy Vasquez has the worst ERA-to-xERA gap among qualified starters in MLB. His ERA is 3.63. His xERA is a whopping 6.26, a catastrophic gap.
His avg exit velocity is 91.3 mph, his hard-hit rate is 46.1%, his xwOBA is .380, and his Barrel% is 13% — all well above league average. What's keeping his ERA at 3.63 is sequencing luck, strand rate, and a Padres defense that has bailed him out all spring.
He has enough name recognition from a strong win-loss record that managers not looking past ERA will want him. They will overpay. Take the deal. Move him for a hitter with counting-stat upside or a reliever with closing utility, and do not hold him through June.
Current ERA vs. xERA Discrepancies
| Pitcher | ERA | xERA | FIP | Verdict |
|---|---|---|---|---|
Reid Detmers, LAA |
3.68 |
2.76 |
2.81 |
BUY — SP2 talent at SP4 price |
Eduardo Rodriguez, ARI |
2.45 |
4.90 |
4.13 |
SELL — ERA-to-xERA gap is the window |
Michael McGreevy, STL |
2.99 |
5.61 |
4.34 |
SELL — velocity down, GB% cratering |
Randy Vasquez, SD |
3.63 |
6.26 |
4.47 |
SELL — hard contact, favorable sequencing, won't last |
The Bottom Line on ERA vs. xERA for Your 2026 Roster
ERA tells you what happened. xERA tells you what the contact quality predicts next. Those two numbers are not the same thing, and the managers in your league who haven't figured that out yet are the ones to offer the sell high names to.
The sell window on these three arms is open today because the ERA still looks good. Once regression shows up in real box scores — and with exit velocity and contact quality this far underwater, it will — the window closes. Check Athlon's pitcher rankings weekly as the schedule hardens in late June, and monitor this gap actively. The managers who act in the information gap win. The ones who wait for the ERA to confirm what the xERA already told them don't.
Questions About ERA-xERA, Answered
What does xERA mean in fantasy baseball?
xERA is expected ERA — a Statcast metric that estimates what a pitcher's ERA should be based on the quality of contact he allows, not the actual outcomes. It removes luck, sequencing, and defense from the equation. When a pitcher's ERA is significantly lower than his xERA, regression toward the higher number is typically coming. When his ERA is higher than his xERA, he may be a buy-low candidate.
Is Reid Detmers a good fantasy baseball starter in 2026?
Yes — arguably one of the most undervalued in the game right now. His xERA of 2.76 and FIP of 2.81 rank among the best among qualified starters despite a surface ERA of 3.68. His K% is a career best, his walk rate is elite, and his contact-suppression metrics are legitimate. The ERA is the outlier. His underlying profile supports a top-20 SP.
Should I trade Eduardo Rodriguez in fantasy baseball right now?
Yes, if the return is fair. His ERA of 2.45 runs more than two runs below his xERA, which sits at 4.90. The ERA is being sustained by favorable sequencing and strand rate. His trade value is currently reflecting the surface number. Use that while you can.
Why is Michael McGreevy's ERA so low if his xERA is 5.58?
A combination of factors: his ground-ball rate has collapsed from his rookie season, his fastball velocity is down, and his exit-velocity numbers are among the worst among qualified starters. The Cardinals' solid defense and a favorable early schedule have insulated the ERA. Those conditions are not permanent.
What is the best way to use ERA-to-xERA gaps in fantasy trades?
Use the gap to identify information asymmetry. When a pitcher's ERA looks bad but his xERA is strong — like Detmers — you buy below market. When his ERA looks strong but his xERA is ugly — like McGreevy or Vasquez — you sell above market. The critical variable is timing. Move before the regression shows up in the ERA itself. Once it does, the opportunity is gone.
Which 2026 starters have the biggest ERA-to-xERA gaps right now?
Randy Vasquez currently holds the worst gap in baseball. McGreevy's 2.63-run gap ranks among the three largest. On the positive side, Reid Detmers carries one of the largest ERA-to-xERA discrepancies in the opposite direction — top-10 xERA, mid-3.00s surface ERA, and a buy price that still hasn't caught up.
