Unfortunately, we're probably going to have to wait another day to find out more about his status.
Romeo said on Monday that he didn't know yet what McCluster's status was, but hoped to learn more by Tuesday or Wednesday. If it's not a serious injury -- like season-ending -- then Crennel could keep us in the dark for a few more days. There's no reason for him to say publicly what McCluster's status is -- outside of what the league requires him to do with the Wednesday through Friday practice reports -- so he might as well keep the San Diego Chargers guessing.
We'll keep an eye out but I'm predicting Wednesday is the earliest we'll hear of anything.