WHOOP, there it is: How some Yankees use a wristband to get better sleep
By Gary Phillips
Published on March 3, 2026.
Boston-based tech company WHOOP, which makes wearable devices and a compatible app, has become a popular tool for improving sleep. The company measures sleep, heart rate, recovery, strain, stress, and offers recommendations on how to improve these areas. Users typically wear a black wristband, but there are also various types of wearable devices. Major League Baseball approved the devices for use in a game in 2017, and other athletes, including LeBron James, Michael Patrick Phelps, and Rory Mc-game. The popularity of WHOOP devices has spread throughout sports, baseball and the Yankees' clubhouse.
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