who’s hot?

Continuing to make his case for a return to the big leagues, Matt Wallner enjoyed another four-hit game — with a home run — on Saturday for Triple-A St. Paul. The ex-Southern Miss star, who also had a four-hit game on Thursday, is batting .396 in June (.458 OBP) with seven homers and 16 RBIs. He was sent down by Minnesota on April 16 following a horrid start. After his recent hot streak, the left-handed slugger is at .246 with 14 homers and 40 RBIs for St. Paul. … Grae Kessinger is also building a case for a return to The Show. The Ole Miss product went 3-for-5 for Triple-A Sugar Land on Saturday and is batting .341 since his June 5 demotion by Houston. Kessinger, a versatile infielder, rarely played (11 at-bats) while he was with the Astros, who are struggling mightily at 32-39. … Former Biloxi High standout Colt Keith, making his case to stay in the big leagues with Detroit, went 4-for-6 in the Tigers’ 13-5 whipping of the Astros on Saturday. After an early June swoon, rookie Keith, 22, is 7-for-13 in his last three games, boosting his average to .235. He has three homers and 20 RBIs. “For me, it’s not about the stats or the data,” he recently said in a FanGraphs article. “It’s a comfort-level thing.” … In four games since he was promoted to Triple-A Gwinnett from Mississippi, Nacho Alvarez is making his case as a prospect to watch in Atlanta’s system. He put up a 4-for-4 game Saturday and is 9-for-18 with two homers in four games for the Stripers. With the Double-A M-Braves, the 21-year-old shortstop hit .265 with no homers in 49 games. … In Low-Class A, former Magnolia Heights star Cooper Pratt is bidding for a move up in Milwaukee’s system. Pratt had a three-hit game for Carolina on Saturday — his fourth three-knock game in his last eight — and is raking at a .429 clip in June. For the season, the second-year pro, 19, is at .310 with two homers, 24 RBIs and 15 steals. He is the Brewers’ No. 8-rated prospect.