The day after Jake deGrom is scratched and put on a "no-throw" rest regimen pending further testing, The Athletic runs this piece: How is the Mets' Jacob deGrom throwing this hard and still getting better? ‘I've never seen anything like it' Tim Britton 4h ago 27 Excerpt: Jacob deGrom does not, as far as anyone knows, play the French horn. He pitches with two cleats on, his hat on straight, and with total commitment to his craft. And yet, when Randy Sullivan, founder of the Florida Baseball ARMory, a training facility in Lakeland that works with pitchers on building velocity, watches deGrom, the only person he can think of in his class is a figure from Mets mythology. “Nice coincidence he's with the New York Mets,” Sullivan said. “He's like the April Fool's joke, Sidd Finch.” Over the first five weeks of the season, deGrom has further solidified his title as the best pitcher in baseball. Since 2018, his ERA over 81 starts is 1.99. In five starts this year, he has allowed two earned runs over 35 innings, striking out 59 batters. Three times he's punched out at least 14. “He's a generational pitcher,” Mets pitching coach Jeremy Hefner said. “We're witnessing something that most guys can't do.” “DeGrom's an interesting case,” Alex Caravan, the manager of data science at Driveline Baseball, said this week. “Because there's not really anybody else like deGrom.” What fascinates so many in the sport is not just that deGrom is this good, but also how exactly he has become this good. The right-hander will turn 33 next month, and yet he's throwing harder than he ever has before — harder than any other starting pitcher in baseball. DeGrom is averaging 98.9 miles per hour on his fastball — the fastest by a starter in the pitch tracking era, which dates to 2008. Since he entered the major leagues in 2014 and especially in the last three years, deGrom has methodically added velocity to his fastball better than anyone in baseball. That would be a remarkable development for any pitcher; it's nearly unfathomable for a pitcher after the age of 30. “It's unprecedented,” Caravan said. “At least, I can't think of anybody off top my head that would fit into quite deGrom's magnitude.” Over the last decade, no starter at any age has added more velocity to their fastball over any stretch of time than deGrom has. Caravan cited research done by Jeff Zimmermann at FanGraphs that showed the average pitcher lost 2 mph on his fastball from age 26 to 32. DeGrom gained more than 4 mph during that span of his career. To try to contextualize this, I looked at the top 15 pitchers by wins above replacement, according to FanGraphs, since 2008, which was when Pitch F/X tracking started.... [FIMG=666]https://cdn.theathletic.com/app/uploads/2021/05/05002340/0429-deGrom-Top-15-without-Jake-e1620224663382.jpg[/FIMG] Oh wait, I forgot to include deGrom in that one. Let's see if he stands out. [FIMG=666]https://cdn.theathletic.com/app/uploads/2021/05/05002334/0429-deGrom-Top-15-Velo-e1620224680321.jpg[/FIMG] https://theathletic.com/2556671/2021/05/05/how-is-the-mets-jacob-degrom-throwing-this-hard-and-still-getting-better-ive-never-seen-anything-like-it/https://theathletic.com/2556671/2021/05/05/how-is-the-mets-jacob-degrom-throwing-this-hard-and-still-getting-better-ive-never-seen-anything-like-it/