Gavin Floyd (elbow) threw 75 pitches -- including 15 changeups -- off a mound on Thursday. Floyd will mix in breaking balls for the first time this weekend. He underwent Tommy John reconstructive elbow surgery last summer and is not expected to be available to the Braves until mid-to-late May. The 31-year-old right-hander signed a one-year, $4 million free agent contract with Atlanta in December.