INDEPENDENCE, Ohio — Kyrie Irving plopped down on a courtside bench following a brisk workout and two team trainers quickly went to work adjusting straps on his new knee brace. The Cavaliers, completely in command of the Eastern Conference finals, may soon be closer to full strength. Irving made some cuts and drives while wearing a brace on his left knee Saturday and the Cavs said the All-Star guard is questionable for Sunday’s Game 3 against Atlanta.