Ellerby sustained a lower-body injury in the second period of Thursday's 4-0 loss at New Jersey in Game 4 when he was checked by Devils center Stephen Gionta into the Devils bench where the open door meets the stanchion. Ellerby was making his first appearance since March 15.
Ellerby was in the lineup because Garrison was a late scratch because of a lower-body injury. Dineen said the Panthers were "cautiously optimistic" Garrison would be able to play Saturday.
Dineen said the Panthers might call up a defenseman from the AHL's San Antonio Rampage, with the most likely candidate being Tyson Strachan.