Originally published on ProWrestlingSheet.

ROH star Nick Jackson injured his rib Wednesday night during a match in Toronto ... and sources tell us he's already made plans to get an official evaluation this weekend from doctors.

The injury was first reported by F4wOnline and we're told it happened while Nick was being powerbombed to the outside onto Kenny Omega during a 6-man tag match with his brother Matt Jackson against Michael Elgin, Hiroshi Tanahashi and Yoshi Tatsu.

No official diagnosis at this point, but sources close to the wrestler tell us Nick is almost positive he broke a rib -- which means he could be out for up to 8 weeks.

We're told Jackson has already booked a doctors appointment for once he returns home on Sunday ... and for now, he's just spending time in NYC with his parents.

UPDATE: Turns out Nick and Matt are BOTH injured -- the latter hurting his hand in the same match. The brothers updated their status Monday on Facebook.