But at this point, neural markers are not considered to be medical information. Instead, in July 2017, the MLB Players Association released a three-page appendix to the CBA stipulating that information gathered from wearable technology—including off-field devices for measuring performance—can remain confidential to the team and available to the player upon request. Teams have told me they consider brain data of the players to be proprietary, even though, technically, they are not the ones collecting it. DeCervo is, and they are permitted to keep the data, too.
