On July 11, 2026, the Arizona Diamondbacks routed the Los Angeles Dodgers 9-2 at Dodger Stadium, and the least likely source of the damage was their 36-year-old backup catcher. James McCann, hitting .227 with zero home runs through his first 24 games this season, hit two in this one game alone — doubling his career home run total for 2026 in a single night.

Across the league that day, the average player hit 0.14 home runs — in other words, most hitters went deep roughly once every seven games they played, if that. McCann hit two in one. That gap works out to a z-score of 4.9, a number so far outside the normal range of a single day's performances that you'd expect to see it maybe once every few seasons across all of MLB, not something that shows up in a random Saturday game between two teams jockeying for position in July.

There's no Statcast readout for these specific two swings — the game-level exit velocity and launch angle data isn't available here, so anything about barrel angle or pitch type is off the table. What we do know: McCann's season-long hard-hit rate sits at 61.6%, meaning when he does make contact, it's frequently hit hard — but his season barrel rate is a minuscule 0.08%, meaning almost none of that hard contact has been turning into the kind of batted ball that clears a fence. That combination — hits the ball hard, rarely barrels it — is a pretty good description of a hitter who's due for exactly zero home runs most nights. Two in one game breaks that pattern completely, and without play-by-play exit velocity for these specific balls, the most honest explanation is that quality contact and puberty-simple luck lined up on the same night.

There's no Statcast readout for these specific two swings — the game-level exit velocity and launch angle data isn't available here, so anything about barrel angle or pitch type is off the table. What we do know: McCann's season-long hard-hit rate sits at 61.6%, meaning when he does make contact, it's frequently hit hard — but his season barrel rate is a minuscule 0.08%, meaning almost none of that hard contact has been turning into the kind of batted ball that clears a fence. That combination — hits the ball hard, rarely barrels it — is a pretty good description of a hitter who's due for exactly zero home runs most nights. Two in one game breaks that pattern completely, and without play-by-play exit velocity for these specific balls, the most honest explanation is that quality contact and puberty-simple luck lined up on the same night.

Context matters here as much as the number itself. McCann is a 985-game veteran with a career .241 average and 99 home runs — a player whose power was never elite even in his prime, and who entered 2026 in the twilight of a long career as a defense-first catcher. Before this game, his 2026 season line read .227/.239/.364 with zero homers in 24 games. This one performance didn't just spike his numbers, it created his entire power output for the year in a single box score. That's not the profile of a hitter riding a hot streak; it's the profile of a low-power player having one outlier night.

The question worth tracking isn't whether McCann suddenly found new pop — his season-long batted-ball profile argues against that — but whether Arizona's coaching staff gives him more starts behind the plate over the next two weeks to see if it repeats. If he goes homerless over his next 15-20 plate appearances, and his hard-hit rate stays flat while the barrel rate stays near zero, this game will look exactly like what the numbers already suggest: a two-homer night from a player who doesn't hit many of them, on a night everything landed right.

Somewhere in Arizona's clubhouse, the exit velocity readouts from those two swings exist. Until they surface, this one stays filed under 'happened,' not 'explained.'