He argued back-to-back in 10-9646. Miller v. Alabama and 10-9647. Jackson v. Hobbs. For the second case, the Chief welcomed him back:

CHIEF JUSTICE ROBERTS: We’ll hear argument
next in Case 10-9647, Jackson v. Hobbs.
Welcome back.
(Laughter.)
ORAL ARGUMENT OF BRYAN A. STEVENSON ON BEHALF OF THE PETITIONER MR. STEVENSON: Thank you, Mr. Chief Justice, and may it please the Court: JUSTICE SCALIA: You haven’t changed your
mind in the interim?
(Laughter.)
MR. STEVENSON: No, Justice Scalia, I haven’t. I do want to emphasize — yes.