Wander Franco didn't travel with the Tampa Bay Rays ahead of the team's series with the Giants in San Francisco, according to sources.

Major League Baseball is looking into social media posts involving the 22-year-old All-Star.

"During today's game, we were made aware of the social media posts that are circulating regarding Wander Franco," the Rays said in a statement Sunday. "We take the situation seriously and are in close contact with Major League Baseball as it conducts its due diligence."

Tampa Bay did not detail the nature of the social media posts.

Franco, who did not play in Sunday's game against the Cleveland Guardians, was in the Rays' dugout at the beginning of the game, then left during the fifth inning.