The key for Matt Wallner, as it is for many power-hitting prospects, is making enough contact for the power to play. The former Southern Miss standout made contact in three of his four at-bats on Wednesday night for High-A Cedar Rapids – and the results were very good. Wallner, Minnesota’s No. 13-ranked prospect by MLB Pipeline, went 3-for-4 with two home runs and a career-best six RBIs. He has 10 homers – and 82 strikeouts — over his 67-game pro career. The 6-foot-5, left-handed-hitting outfielder tied the USM single-season record for homers in 2019 with 23 and finished his three years in Hattiesburg with a school-record 58. … It was a big night for big flies among Mississippians in the minors. Mississippi State alum Brent Rooker, back in Triple-A for Minnesota, hit one out for St. Paul. The Twins’ No. 12 prospect is 3-for-29 with one homer in eight big league games this season. Ex-Ole Miss star Grae Kessinger homered for Double-A Corpus Christi in Houston’s system. Columbia High product Ti’Quan Forbes went deep for Birmingham (Chicago White Sox) in its season-opening win over Biloxi in the Double-A South. He also stole a base and committed an error at third base. And at the White Sox’s Low-A Kannapolis club, former Loyd Star standout James Beard, known more for his speed than his power, hit a grand slam. … Also of note: Ole Miss alum Nick Fortes, in his Double-A debut, had two hits for Pensacola (Miami Marlins) in its 2-1 win against Mississippi in the M-Braves’ home opener. Former Ole Miss standout Anthony Servideo and ex-State star Jordan Westburg made their pro debuts for Low-A Delmarva (Baltimore Orioles) in a doubleheader against Salem. Servideo was 1-for-5 with four walks, Westburg 2-for-8 with an RBI.