A sharp-eyed Astros fan on Reddit noticed a remarkable statistical comparison: Yainer Diaz has drawn just 67 walks since making his major-league debut in 2022. Yordan Alvarez has 68 unintentional walks this season alone.
Alvarez has actually walked 100 times in 2026, but 32 of those were intentional. Take those away, and he still has one more walk this season than Diaz has accumulated in his entire career.
The comparison is funny. The numbers behind it are even more interesting.
Yainer Diaz Likes to Swing
There is aggressive, and then there is Yainer Diaz.
Diaz has swung at 57.9% of the pitches he has seen this season, compared with an MLB average of 47.8%. That puts him in the 98th percentile among major-league hitters.
He is even more extreme when pitches leave the strike zone. Diaz has chased 44.9% of those pitches, compared with the MLB average of 32%. His chase rate ranks in the second percentile.
The aggression is not new. Diaz’s swing and chase rates have remained exceptionally high throughout his major-league career. This is not a bad month or a recent change in approach. It is fundamentally the kind of hitter he is.
Pitchers have little reason to expect Diaz to wait them out.
But He Keeps Hitting the Ball
There is a reason Diaz can get away with an approach that would be disastrous for many hitters: He is remarkably good at putting the bat on the ball.
Diaz has made contact on 78.1% of his swings this season, placing him in the 85th percentile. Even when he chases outside the strike zone, he makes contact 63.3% of the time, good for the 92nd percentile. His 89.6% contact rate on pitches in the zone is also well above the MLB average of 84.9%.
That creates an unusual combination. Diaz swings at pitches other hitters would take, but he also hits pitches other hitters would miss.
The pattern has persisted throughout his career. His chase rate has remained above 42% in every season in which he has received significant major-league playing time, while his ability to make contact has improved.
Saturday night offered a good example of what the approach can produce. Diaz accounted for three of the Astros’ five hits in their 3-2 loss to Tampa Bay and drove in Houston’s other run.
He did not draw a walk.
Then There’s Yordan
Alvarez presents a very different problem for opposing pitchers.
His power makes throwing him strikes dangerous, and pitchers have increasingly chosen not to challenge him. That has produced 100 walks this season, including 32 intentional passes.
Take those intentional walks away, and Alvarez still has 68.
Diaz has 67 in his career.
The comparison is funny, but the numbers behind it reveal something more interesting. Diaz is not merely an impatient hitter. He has an unusually aggressive approach—and unusual bat-to-ball ability that allows him to survive it.
The remarkable part is not that Diaz swings so much. It is how often he manages to make contact when he does.
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