Pitchers veering outside strike zone more than ever to record a strikeout
Earlier in his career, whenever he fell behind in the count against some of baseball’s best hitters, Justin Verlander would do some onthemound calculus. He often would opt to fire a downandaway fastball, willing to concede a single rather than something worse — “Here you go, take your hit to the opposite field.”
But recently, even those pitches have started flying out of the ballpark.
“You have to miss bats now,” Verlander said. “The game’s changed.”
Pitchers’ targets have changed, too. The universal edict among pitching coaches, from Little League up, is to implore their charges to throw strikes. But more and more in the modern big leagues, that does not mean throwing the ball in the strike zone.
The result is a pitching paradox in the majors: Even as MLB is on a pace to set a strikeout record for the 14th straight season, the rate of pitches actually thrown in the rulebook strike zone has decreased almost as consistently.
In 2002, 54.2% of all pitches were thrown for strikes. That figure in 2019 is a recordlow 42.2%. The odds of a pitch going in or out of the strike zone has not been a binary 5050 proposition since 2008. (Swings are not included, just pitch location. All data is collected by Sports Info Solutions and posted on the analytics website FanGraphs.)
“That number actually blows my mind,” Giants second baseman Joe Panik said. “Looking at 42% and it’s like, ‘All right, then why don’t we just take every walk?’ But, the pitchers, it’s a credit to them of how they’re very skilled as to how they create the movement.”
Mike Dunn, a reliever for the Rockies, said some scouting reports specifically call for a “striketoball pitch” that looks like it will land inside the zone and then ends outside it. “Our goal as pitchers might be to get that number lower,” he said of the 42.2% figure.
What’s behind this evolution? It is largely because baseball’s incentive structure has shifted, with teams increasingly prioritizing hitters with home run power and pitchers with elite velocity.
“With more maxeffort deliveries, some guys are focused more on the speed and action of the pitch as opposed to the location of it,” said St. Louis starting pitcher Miles Mikolas, before adding: “You’ve got guys throwing real hard, so some hitters seem like they make up their mind, ‘I’m going to swing, or I’m not going to swing,’ and it doesn’t really matter where the pitch is.”
That also means more wild pitches and hit batsmen — both are on track for record highs — although there has not been a corresponding growth in the number of walks. Instead, atbats are lasting much longer, with deeper counts: Batters are seeing a recordhigh 3.91 pitches per plate appearance this season.
Pitchers are no longer peppering the margins of the zone as much as throwing deliberately outside it — usually north and south rather than east and west. Throws targeted for the inside and outside corners have been replaced by fastballs that rocket above the zone or breaking balls that dive below it.
MLB is taking at least one small step to coax pitchers back to the strike zone. In the independent Atlantic League, which has partnered with MLB to test rules, a new rule allows batters to try to advance to first base after any bounced or dropped pitch, not just on a third strike.
But in the majors, many pitchers have adjusted drastically. In Verlander’s first five bigleague seasons (200509) with the Tigers, from, nearly twothirds of his pitches were fastballs. In 2019, his fastball rate is 51.7%, even as he continues to post an elite strikeout rate. Batters are swinging and missing at a third of his pitches, the highest rate of his career. He also is allowing more home runs than ever.
“That’s why I’m throwing more offspeed,” Verlander said, because those pitches induce more swings and misses.
Overall swing percentage has remained relatively flat in the past two decades, with hitters taking cuts between 45 and 47% of the time, but there has been a jump in swings at pitches outside the zone: from 18.1% in 2005 to 31.2% in 2019.
“Pitchers’ stuff is really good, so they’re OK with throwing that pitch that starts as a strike and turns into a ball because it looks good to hit, and then when you go to swing, it’s not,” Colorado third baseman Nolan Arenado said. “And you’re already committed, so you’re in trouble. And there’s hitters that you don’t really need to throw strikes because they’re going to chase — including me.”
Modern scouting reports are highlighting hitters’ tendencies to swing outside the zone. Mets first baseman Pete Alonso said his simple goal of making “quality swing decisions” is harder knowing the volume of advanced data pitchers can use to prepare.
With two strikes, the trend is exaggerated. Sports Info Solutions reports that barely over a third (36.2%) of twostrikes pitches this season have been thrown in the strike zone.
Compounding matters for hitters is an emphasis on pitch tunneling, the effort to give different pitches the same trajectory — as if traveling down the same tunnel — for much of their flight toward the plate before veering in different directions. Highspeed cameras, pitchtracking cameras and radar have helped pitchers concentrate on this skill.
This deceit makes hitters’ decisionmaking that much harder. Kyle Boddy, founder and director of pitching at Driveline Baseball, hypothesized that the analyticsfueled emphasis on walks and onbase percentage had faded, leading to more chasing: Strikeouts are accepted as a byproduct of home runs, so hitters do not change their approach with two strikes.
One more effect is the pace of play; all of these long atbats have helped drive the average length of games further north of three hours.
“It’s not the pitch clock,” Giants catcher Stephen Vogt said of the purported need to hasten the interval between deliveries. “It’s the fact that we’re throwing so many pitches now.”