One difference between 10 years ago and now is that teams have more information at their disposal, which allows them not to have to rely on cookie-cutter guidelines, such as not increasing a pitcher’s innings by more than 20 percent over the previous season.

So while Severino’s workload has not been curtailed this season, Jordan Montgomery — who at 24 is a year older than Severino but also in his first full major league season — has pitched more sporadically in the last two months in an effort to limit how much he will ultimately throw.

Severino, meanwhile, was on a pitch limit in 2015, when he made his major league debut in early August, because he had thrown only 1,009 pitches the previous season.

With high-speed cameras in all ballparks, teams can now look at data for signs of fatigue in a pitcher, such as a diminished spin rate. There is also more sophisticated tracking of pitchers’ recovery programs between starts. And sensors built into fabric, which can detect stress on a ligament during a pitch, have been developed but are still pending approval from Major League Baseball.

“We know up to this point that there are three things to keep a pitcher’s arm healthy: his mechanical efficiency, his functional strength and his throwing workloads,” said Tom House, a former major league pitcher who is developing and marketing an algorithm that tracks pitchers’ recovery on a mobile device. “We have the capacity now to personalize the price a pitcher pays to throw a pitch in game conditions.”

When the Yankees create programs for their young pitchers to follow, there are many voices in the organization that weigh in: coaches, data analysts, strength and conditioning coaches, sports scientists and the team’s medical doctor, Dr. Christopher Ahmad, who has published papers on pitchers’ arm injuries.

“I’m not sure we’re all the way there yet with that kind of information,” said Larry Rothschild, the Yankees’ pitching coach. “Hopefully, we get there, because it would be nice to have some foundation that’s code-able, that isn’t just eyeballing it and saying, well, we don’t want to increase this guy more than 20 percent. Why? There has been research done on all of it, but it will be more credible when it comes from sports scientists.”