on basketball Confusion reigns on Celtics early in Brad Stevens era ← Related Article Visit The Boston Globe Share on Twitter Share on Facebook Comment on this Scroll to top of page Yoon S. Byun/Globe Staff Celtics coach Brad Stevens exchanged greetings with Jazz forward Gordon Hayward, who starred on Stevens’ successful Butler University teams, before Wednesday’s game at TD Garden. Yoon S. Byun/Globe Staff Stevens watched his team warm up prior to the game. Yoon S. Byun/Globe staff Celtics guard Avery Bradley, who checks in at 6-foot-1, tipped his own miss into the basket over 6-foot-10 Jazz forward Darrick Favors in the second quarter. Yoon S. Byun/Globe staff Celtics forward Brandon Bass fouled Jazz forward Richard Jefferson as Jefferson drove to the basket in the third quarter. Yoon S. Byun/Globe staff Jeff Green (left) and Avery Bradley spoke while they sat on the sidelines. Yoon S. Byun/Globe staff Stevens and Celtics rookie guard Phil Pressey discussed things during a break in the action. Yoon S. Byun/Globe staff Bass helped up teammate Jeff Green after Green was fouled by Jazz guard Jamaal Tinsley in the third quarter. Yoon S. Byun/Globe staff Brad Stevens watched the action from the Celtic bench during the third quarter. Yoon S. Byun/Globe staff Celtics forward Gerald Wallace went tumbling after he was fouled on a pick set for Jazz guard Alec Burks (left). Yoon S. Byun/Globe staff Bass’s slam dunk, which followed an outlet pass from Bradley, put the final punctuation on the Celtics’ first win of the season. Yoon S. Byun/Globe staff Kelly Olynyk (left) and Jeff Green were all smiles after the final buzzer went off.