The Home Run Derby Curse: Real or Myth?

by

Every July, the same argument: does the Home Run Derby ruin swings? The “Derby curse” is baseball’s most durable folk belief — born the summer Bobby Abreu hit 41 Derby homers and then nearly stopped homering entirely, fed by a generation of second-half slumps, and stubbornly resistant to the statisticians who keep explaining it away. With eight more hitters swinging for $1 million on Monday in Philadelphia, here’s the full case file: the victims, the counter-evidence, and what’s actually going on.

The short version: the slumps are real, the curse probably isn’t — but the explanation for why is more interesting than either side admits.

The chart below covers the famous victims, the case for the curse, the case against, and the verdict. Take a look, then we’ll break it all down.

Home Run Derby 2026
The Home Run Derby curse: real or myth?
2005
Abreu: the founding legend
18→6
his HR split that season
~500
max-effort swings in one night
NO*
the statistical verdict
The famous “victims”
Bobby Abreu, 2005 The founding legend: a then-record 41 Derby homers… then 6 home runs the ENTIRE second half (after 18 in the first). He later blamed the Derby outright
David Wright, 2006 20 first-half homers, 6 after — the sequel that made it a “thing”
Chris Davis, 2013 A 37-homer first half became a 16-homer second — the modern era’s exhibit A
Josh Hamilton, 2008 The 28-homer round at Yankee Stadium is immortal; his power output the rest of the season sagged — and he hadn’t even won
The pattern believers see: career-best first halves, a night of maximum-effort swings, and a slump that starts almost immediately after.
The case for — and the case against
FOR: the workload Hundreds of max-effort swings in 90 minutes — a workload no game produces — with mid-season fatigue already banked
FOR: the mechanics A night of grooved 60-mph pitches rewards uppercut sell-out swings — players and coaches swear the timing residue lingers
AGAINST: regression to the mean Derby invitations go to players having CAREER-BEST halves — who were always going to cool off. Studies comparing them to equally hot non-participants find similar second-half declines
AGAINST: the thriving winners Alonso won twice and kept mashing; plenty of champions’ second halves were fine — the curse only gets cited when the slump cooperates
The asterisk on “no”: the modern pitch-count format (20/15/15 swings, no timer) was designed partly in response to the fatigue critique — the event itself quietly conceded half the argument.
The verdict, and what to watch Monday
The honest answer The slumps are real; the CAUSE is mostly selection bias. But “mostly” is doing work — fatigue and timing effects at the margins have never been ruled out
Why it survives Because every year SOMEONE from the field slumps — eight hot hitters guarantee it — and the curse gets its annual anecdote
Monday’s watch The 2026 field’s first-half numbers are career-bests almost across the board — meaning this year’s “curse victim” is statistically guaranteed, whoever swings
This page will check back on the 2026 field’s second halves in September — the curse ledger updates annually.
Splits via Baseball Reference. The 2026 Derby is Monday, July 13 at Citizens Bank Park; the curse discourse begins Tuesday, as always.

The most famous “cursed” performance ever: Hamilton’s 28-homer first round at the old Yankee Stadium — 13 in a row at one point, seven over 500 feet. He lost the final, exhausted, 5-3.

How One Summer in Detroit Built a Curse

The belief has a precise birthday: July 11, 2005, Comerica Park, when Bobby Abreu put on the greatest power display the Derby had seen — 41 homers, including a then-record 24 in the first round — and then spent the rest of the season as a different hitter, six home runs across the entire second half after eighteen in the first. Abreu himself blamed the Derby, telling reporters in later years that the night wrecked his timing, and the sport had its origin myth.

David Wright’s 20-to-6 collapse the following season made it a pattern; Chris Davis’s 37-to-16 split in 2013 gave it a modern exhibit; and Josh Hamilton’s 2008 provided the mythic centerpiece — 28 homers in one round at Yankee Stadium, arguably the most famous batting-practice session ever conducted, followed by a power fade that believers still cite even though Hamilton didn’t win the event. The mechanism always offered is the same two-headed one: workload (hundreds of maximum-effort swings in 90 minutes, mid-season, in July heat) and mechanics (a night spent selling out for lift against grooved 60-mph pitches, leaving timing residue that regular-season velocity punishes). Players believe it enough that agents and front offices have discouraged participation — the quiet reason several superstars decline every year.

The Statistician’s Answer, and the Asterisk

The counter-case starts with an unglamorous phrase: selection bias. Derby invitations go to hitters having career-best first halves, and career-best halves are, by definition, the thing most likely to be followed by cooler ones — regression to the mean, not sabotage. Every serious study of the question has run the comparison the folk belief skips: put Derby participants next to equally hot All-Star sluggers who didn’t swing, and the second-half declines come out looking similar, which is the statistical equivalent of the curse dissolving on contact.

The thriving-champions list makes the same point anecdotally — Pete Alonso won twice and kept mashing, and most winners’ second halves are unremarkable in both directions — while the curse survives on a guarantee: with eight over-performing hitters in every field, someone will slump, and that someone becomes July’s cautionary tale while the six who didn’t go unmentioned. The honest asterisk: “mostly selection bias” is not “entirely,” fatigue and timing effects at the margins have never been cleanly ruled out, and MLB itself half-conceded the workload critique when it rebuilt the format around fixed pitch counts instead of frantic timed rounds. Believe the slumps, doubt the curse, and check back in September — this page will run the 2026 field’s second-half audit either way.

Final Word

The Home Run Derby curse: born with Abreu’s 18-to-6 collapse after his record 2005 performance, fed by Wright, Davis, and the Hamilton legend, explained by workload and timing theories that players genuinely believe — and largely dissolved by the statistics, which find that Derby hitters slump at about the rate of any player coming off a career-best half. The slumps are real; the cause is mostly selection, with an asterisk for fatigue the sport itself acknowledged by changing formats. Eight career-best first halves swing Monday in Philadelphia, which means next year’s curse anecdote is already in the field. The September audit lands here.

The format that answered the fatigue critique is in the Home Run Derby rules, explained, the greatest nights (cursed and otherwise) are in Home Run Derby records, and the full champions ledger is in Derby winners by year.