Major League Baseball launched an investigation into Tampa Bay Rays shortstop Wander Franco and the team placed him on the restricted list after social media posts questioned the alleged nature of a relationship between Franco and a younger woman, sources familiar with the situation told ESPN.

Franco, 22, did not make the trip with the Rays to San Francisco, where they begin a three-game series Monday, sources told ESPN. Teams can use the restricted list, which takes a player off the team's roster and is typically unpaid, for a variety of situations, including potential legal matters.