The list of NBA Combine invites came out last night. Moussa Diabate is on the list and Caleb Houstan isn't. Caleb also isn't on the G-League combine list, where you'll find former Michigan guard Eli Brooks. So that seems strange.
Then reports started coming out that Caleb declined the NBA Combine invite. Which also seems strange. Caleb and Moussa both left early to get NBA feedback. Both are rarely seen on any mock drafts and it would seem likely they both would want to use the NBA Combine as a showcase for feedback on draft position or needing to go back to school.