What saying is hidden in this rebus?
Playing at first base is Bert Kidney.
Playing at second base is Ernie Liver.
Playing at third base is Tom Stomach.
Playing at shortstop is Jerry Pancreas.
Playing behind home plate is Felix Heart.
On the mound is Oscar Lung.
Home is where the heart is (the player whose last name is Heart is at home).
Today's brain teaser courtesy of Braingle.com.