New level, no problem for Atlanta prospects Austin Riley and Ronald Acuna. Former DeSoto Central High star Riley went 2-for-4 in his Double-A debut with the Mississippi Braves on Thursday night, while Acuna, promoted from the M-Braves to Triple-A Gwinnett, homered and added two more hits for the G-Braves. Riley, a first-round supplemental pick in 2015, is rated the No. 11 prospect in Atlanta’s system by Baseball America and No. 12 by MLB Pipeline. The 20-year-old played third base and batted third for the M-Braves in a 2-0 win at Pensacola. He was batting .252 with 12 homers at high Class A Florida after belting 20 bombs at low-A Rome in 2016. Travis Demeritte, also regarded as a prospect, moved back to second base from third in Thursday’s game for the M-Braves; Demeritte has 11 homers but is hitting just .211. (The M-Braves’ next home game is July 19.) In Charlotte, N.C., on Thursday, the 19-year-old Acuna, BA’s No. 10 overall prospect, played right field and batted leadoff in the G-Braves’ 13-4 victory. After fanning in his first at-bat, he went yard in his second. He scored three times and drove in two runs. Acuna, who began this season with the high-A Florida club, hit .326 with nine homers – including a shot over the Trustmark Park batter’s eye on Tuesday – 30 RBIs and 19 steals in 57 games for the M-Braves. He played in the All-Star Futures Game on Sunday. The Braves may be considering adding Acuna to the big league roster if they are still in the playoff hunt in the season’s final weeks. He could be a difference-maker.