From the official site:

Former Major Leaguer Frank Torre needs a kidney transplant because of medication he's taken since receiving a new heart more than a decade ago. ...

"I talked to him yesterday. He sounded good yesterday," Joe Torre said on Thursday. "His heart is working on the 11th year now. With all the rest of the medication you have to take, the rest of the organs take a beating. That's what it comes down to."

Our thoughts are with the Torre family.