Disclaimer: I’m speculating right now.
The position he was holding his arm in and the way he supported his elbow with the other hand is a telltale sign of a collarbone injury. When he first hurt it on that hard impact with the ground, my assumption was broken collarbone. But when he went back in and scored right after, that pretty much ruled out a break. At this point I’m guessing AC joint separation (separated shoulder). Based on severity, it can take anywhere from a few days to a few months. People who are super fit like Dalton heal faster. So I would say a couple of weeks most likely.