Barman at 16 years and 157 days beat Afghanistan's Mujeeb Ur Rahaman's record who had played his first IPL game when he was 17 years and 11 days old.
Barman, who shone brightly for Bengal in the domestic season, was brought into the side in place of right-arm fast bowler Navdeep Saini
Sunrisers made two changes, replacing injured Kane Williamson for Mohammad Nabi and Deepak Hooda for Shahbaz Nadeem.
Bhuvneshwar Kumar will lead the side in Williamson's absence.
Sunrisers Hyderabad (Playing XI): Bhuvneshwar Kumar (C), David Warner, Johnny Bairstow, Vijay Shankar, Manish Pandey, Mohammad Nabi, Deepak Hooda, Yusuf Pathan, Rashid Khan, Siddharth Kaul, Sandeep Sharma.
Royal Challengers Bangalore (Playing XI): Virat Kohli (C), Parthiv Patel (wk), Moeen Ali, AB de Villiers, Shimron Hetmyer, Shivam Dube, Colin de Grandhomme, Umesh Yadav, Mohammad Siraj, Prayas Ray Barman, Yuzvendra Chahal