He died on the evening of Dec. 8 at Hoag Memorial Presbyterian Hospital in Newport Beach, Calif.
Del Rosario, a hard-hitting knockout artist who also competed for Strikeforce, M-1 Global, ShoXC, and King of the Cage, had been in a cardiac care unit in California and was critically ill after suffering sudden cardiac arrest on Nov. 26, but fight fans were hopeful he would survive after he showed some initial signs of improvement.
However, things took a turn for the worse on Nov. 28, as he displayed no signs of brain activity.
Del Rosario was taken off life support on Nov. 29, but his body survived until his death was confirmed on Dec. 8.
"Shane had a catastrophic cardiovascular collapse at home on Tuesday morning. He was brought to the hospital in full cardiac arrest. He was resuscitated in the emergency room back to a stable heart rhythm and blood pressure. He is currently in the coronary care unit critically ill. Our prayers are with him and his family," said del Rosario's manager, Jason House, shortly after Del Rosario's collapse occurred.
Doctors gave Del Rosario three full days to respond to treatment, which brought the timetable for the decision on pulling the plug on his life support to the morning of Nov. 29.
He apparently did not improve or show brain activity by the morning of Nov. 29, so Del Rosario's family decided to take him off life support.
Del Rosario was scheduled to fight Guto Inocente at UFC 168 in Las Vegas next month, but he withdrew from the fight due to a rib injury.
He went 0-2 in his two UFC appearances.
UFC fans are asked to keep their thoughts and prayers with the Del Rosario family during this difficult time. Funeral plans have not yet been announced.