Two riders were taken by Airmed to Nobles Hospital during racing at the Southern 100 yesterday evening.
Ramsey's Conor Cummins and Tom Parkes were reported to have non-life threatening injuries following a four-rider incident in the opening lap of the Supersport event.
The race was red flagged.
Conor's girlfriend last night posted on Facebook that he had broken his left forearm, and was going for more x-rays.
An update from race organisers this morning describes him as comfortable.
Tom has since been discharged.
The two other riders weren't seriously injured, though Ivan Lintin went to hospital for a check up.
There was a separate four-rider incident at Ballakaighan earlier in the meeting, but Dave Taylor, Marie Hodgeson, Niklas Pfeiffer and Chris Mitchell all walked away from it uninjured.
Meanwhile, Dean Harrison won the 1000cc and 600cc races to complete a hat-trick of wins at the meeting.
Ivan Lintin won the 650cc Supertwin Race and Ian and Carl Bell won the Sidecar race.