some dude on twitter, I dont even know who he is but he's the only one that has seemed to have any idea This info orginally came from Sean Kernan (Daytona journalist) @KernanSean · 22m @BrianBuckWargo @daytonacubs day off Friday, came down on shoulder diving for ball Thursday, but he said he was fine. maybe xtra day of rest Confirmed by Robbie Aaron (Daytona Cubs media relations guy) @RobbieAaron @KernanSean @BrianBuckWargo That's exactly what it is. Getting treatment during the day & Cubs don't want to take any risks. Nothing serious