Buster Posey has announced he has opted out of the MLB's restart out of health concerns for his newly adopted twin baby girls.

The babies were born about eight weeks prematurely last Friday and Posey and his wife, Kristen, finalized the adoption on Thursday.

The babies will spend the time in neonatal intensive care and will have weakened immune systems for the next few months.

"In the current state that we are right now and these babies being as fragile as they are for the next four months, at minimum, this ultimately wasn't that difficult a decision for me," Posey said. "From a baseball standpoint, it was a tough decision. From a family standpoint and feeling like I'm making a decision to protect our children, I think it was relatively easy."

Posey said he and his wife had been trying to adopt children for the past few years without success.

Posey said he likely would play if not for the state of his newly adopted babies. 

"If these babies hadn't been born right now and weren't premature, I probably would be playing," Posey said. "I do think it's very much an individual decision because we're all trying to decipher information that's changing rapidly."