San Francisco Chronicle

The problem with ‘launch angle’ homers

- Bruce Jenkins is a San Francisco Chronicle columnist. Email: bjenkins@sfchronicl­e.com Twitter @Bruce_Jenkins1

It sounds so easy, and a lot of players make it so. Baseball’s “launch angle” craze is largely responsibl­e for the dramatic surge in home runs, and several hitters have changed their approach to join the party. Just put a natural uppercut on your swing, look to drive the ball high and far, and take a leisurely stroll around the bases.

The Giants’ Mac Williamson provides an excellent example of a radically redesigned swing. His model is the Dodgers’ Justin Turner (currently injured), who turned himself into one of the game’s most feared hitters. But is it really that simple?

Tim Flannery, the former Giants coach and one of the smartest baseball minds you’ll ever run across, has a few questions on the subject.

“I’ve been told by the analytics people that a 27 percent launch angle with exit velocity at a certain speed is a home run,” Flannery said recently. “So how do you get that launch angle if the pitcher is throwing a 95-mph power sinker down and away?”

Flannery would also like to know:

“What if the pitcher throws a fastball at the very top of the strike zone, and now the only way you can hit it is at a higher launch angle? Does it result in a pop-up?

“What if you have the perfect launch angle of 27 percent and the pitcher throws you 88 mph instead of the 92 you had calculated and it results in a soft flyball to the warning track? What if you need a line drive up the middle or a grounder in a hole to win the game? Does any of that get calculated into the equation?

“I hate to be a buzz-kill,” Flannery said, “but I need these questions answered before I can buy in. I love a lot of the new metrics, like WAR and BABIP, but after playing and coaching in the big leagues 26 years, I’m not sure you can calculate all this informatio­n and hit a Madison Bumgarner slider with teeth headed to bite your back foot.”

And in closing, Flannery quotes the great Jimmy Buffett: “Don’t try to describe the ocean if you’ve never seen it.”

A legend moves on

Ichiro was a man who never bothered with launch-angle theories, making him impossible to defend, and the baseball world is toasting his career. He tailored his swing to the situation, calling up offfield liners, dead-pull shots, bunts, even home runs (117 in his MLB career) to fit the circumstan­ce. So much to remember: Hitting .372 with a record 262 hits in 2004, his inside-the-park home run in the 2007 All-Star Game at AT&T Park, that epic throw from right field against the A’s, cutting down Terrence Long at third, and always the dignified presence of royalty . . . With shortstop Cory Seager out for the year, could the Dodgers trade for Manny Machado, a potential free agent who won’t be re-signing with Baltimore? It won’t be easy. Taking on Machado’s contract would put the Dodgers beyond the luxury-tax threshold, something they have worked ardently to avoid. And they probably don’t have the prospects to make it work, given that promising pitcher Walker Buehler will be needed in that rotation . . . You’ll be hearing a lot about manager Gabe Kapler when the Giants visit Philadelph­ia next week. In short, he’s a new-age thinker who relies heavily on analytics — sometimes to the extreme. After a disastrous opening week in which he summoned a relief pitcher who hadn’t warmed up (among other dubious moves), Kapler was roundly booed at the Phillies’ home opener. But he listens to his players, some of whom had thoughts of mutiny. And it was an ex-A’s pitcher, Pat Neshek, who met with Kapler for two hours at a hotel bar and explained, in essence, “Analytics are fine, but trust your eyes, too — and follow your instincts.” Kapler went with more convention­al methods, the team went on a hot streak, and a fine story is developing.

It’s hard to argue against safety measures in sports, such as extended netting at the ballparks and football sanctions against helmet-to-helmet contact, but eliminatin­g kickoffs? That’s the talk in collegiate and NFL circles, and it’s a joke. Kickoffs are a huge part of the game, exciting by nature and a great chance for teams to change the tenor of a game. Onside kicks are another vital, indispensa­ble component. Safety-related adjustment­s are planned for the coming NFL season, but I’d go the other way: Do everything possible to have every kick returned ... Here’s a guarantee that the Mavericks big-wave surf contest actually will be held this winter. Three reasons: As opposed to past years, when the contest window was all too short, the World Surf League plans to hold its Mavericks, Peahi (Maui) and Nazare (Portugal) events from October through February. “With a five-month waiting period, we’re confident we’ll be able to run those three events in great surf,” said WSL Commission­er Mike Parsons. Secondly, the WSL doesn’t wait around, hoping for some ultimate swell down the line. Contests go as soon as the conditions are right. And third, Mavericks will hold priority over Peahi and Nazare because it hasn’t run since February 2016 ... Drake is a talented musician — and also one of the most obnoxious courtside fans in NBA history, routinely shouting at opposing players in Toronto and acting as if he’s actually in the game. He should be banned — but wait, let’s propose a trade instead. He gets to stay, but at his next six concerts, he must be joined by six members of the Raptors, armed with tambourine­s and kazoos.

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