"Please keep Colby & his wife Emily in your thoughts & prayers at this time," the Oilers said.
Emily Cave addressed the situation on Instagram: "Last night and today have been the worst days of my life. Colby is currently in surgery and they are fighting to keep him alive. We need a miracle. Please pray for my husband and best friend."
The Oilers provided an update on Cave as well:
Edmonton Oilers @EdmontonOilers
UPDATE: #Oilers & @Condors forward Colby Cave is out of emergency surgery at Sunnybrook Hospital in Toronto. Doctors removed a colloid cyst that was causing pressure on his brain. He remains in a medically-induced coma. Emily & his family ask for continued thoughts & prayers.
The 25-year-old appeared in 11 games for the Oilers this season and spent most of the year with their AHL affiliate, the Bakersfield Condors. He had 11 goals and 12 assists in 44 games for Bakersfield.
The Oilers claimed him off waivers in January 2019 and he made 33 appearances (two goals, one assist) over the second half of the 2018-19 season.