The short answer: I have no idea. I’ve got some suspicions, which I’ll examine in a bit, but this post will offer no definitive conclusion to the question in its headline.

Here’s what we know: Since 2005, teams have seen at least four members of their pitching rotations make 30 starts apiece in a single season a total of 30 times. Twelve organizations have never done it at all in that span. Of the remaining 18 Major League teams, only one franchise has had four starting pitchers remain healthy and effective enough to stay in its rotation more than twice since 2005: The Chicago White Sox, who have done it five times.

And there’s way more. In a must-read post to The Hardball Times last month, Jeff Zimmermann looked at every team’s total days spent on the disabled list. Not only did White Sox players miss by far the least time with injury in the 2015 campaign — 353, more than 1,500 fewer than the league-leading Rangers — but dating back to 2001, the South Side club has seen its players miss about 3,000 fewer games than the next healthiest club. Take a look at Zimmermann’s chart here. It’s nuts.

White Sox players spend so little time on the disabled list that there seems like no way it could be a coincidence. And the organization can boast some continuity over that entire timeframe: Chicago promoted Kenny Williams to GM after the 2000 season, and Williams remained in that role until he was promoted to executive vice president and replaced by longtime assistant Rick Hahn in 2012.

It’s worth noting, of course, that the White Sox’ ability to prevent injuries hasn’t always made them a good team. They won the World Series in 2005 and reached the playoffs again in 2008, but they have mustered only one winning season in their last five. Billy Beane has called team health “the No. 1 predictor of success” for big-league clubs, but the White Sox’ health has not always been enough to mitigate their general lack of talent. Avoiding DL trips is one important component to winning, but by no means the only one. Obviously.

Regardless, if injury prevention is the next big frontier in baseball, the 29 other teams must be studying the White Sox to figure out exactly what they’re doing right in that department. And without access to those secrets, it’s difficult to identify a single clear method to their success. What follows here are five possible explanations.

A great training staff: Chicago has also had continuity in its training room thanks to veteran trainer Herm Schneider, the man once charged with getting Michael Jordan in baseball shape. For their success with unorthodox starters like Chris Sale, Schneider and his staff have been dubbed “miracle workers” by sports injury expert Will Carroll, and outfielder Adam Eaton credited Schneider as part of his motivation to sign a contract extension with the White Sox.

Vigilant coaches: If most injuries — especially to pitchers — come from mechanical concessions made to fatigue, then it could be that the White Sox stay healthy because of coaches with a strong sense of when to pull guys out of games. Minus the two games he spent as interim manager, pitching coach Don Cooper has worked in the same role for the White Sox since 2002. Cooper has <em>also been called a “miracle worker,” and Sale, among others, has praised Cooper’s ability to monitor his pitchers during games.

Personnel: No matter what’s happening on the organizational level, the White Sox must owe at least some of their success in avoiding DL trips to the injury tendencies of the players on their rosters. Having Mark Buehrle on your team, for example, has proved an extremely effective way of ensuring that at least one of your starters makes 30 starts in a season. And the Texas Rangers, at the opposite end of the injury spectrum from the White Sox, owe a big chunk of their huge lead in DL time over the last few seasons to young infielder Jurickson Profar, who has spent the last two years on the shelf with shoulder woes. There’s a chicken-and-egg thing happening here, obviously, but some of it points to…

Organizational priorities: Presumably every team puts some emphasis on identifying players who won’t break down, but it seems likely the White Sox do it more emphatically or more effectively than their counterparts. One of Chicago’s biggest acquisitions before the 2015 season was Jeff Samardzija, a pitcher known for an arm that looks “right out of the womb” on medical records and a guy who has been, to date, more reliably healthy than reliably effective. But then, the Sox also added Melky Cabrera last offseason with Cabrera coming off two straight seasons ended by surgery and a third ended by performance-enhancing drug suspension.

Hubris: Hey, it worked for Macbeth. The blog South Side Sox, in a more detailed analysis of the White Sox’ DL time, points out that Sale spent only seven days on the disabled list to start the season after breaking his foot in spring training, but owned a 5.93 ERA over his first five starts (though, to be fair, only the last two of them were clunkers). And Adam LaRoche avoided the DL, but endured the worst full offensive season of his career after battling a hand injury. There’s an argument to be made that the White Sox would be better off being a little bit worse at keeping guys on the field whenever it comes with diminished production.