Today is one of those days when a Mississippi Braves fan scanning the previous day’s box scores might have to pause and think, Why did Atlanta let him go? Former M-Braves are scattered all over the big leagues now, and quite a few are having impactful seasons in places other than the ATL. The enigmatic Jason Heyward is suddenly crushing it for the Chicago Cubs; he went 3-for-6 with three RBIs in a big win against Milwaukee and is batting .387 with 10 RBIs in his last 15 games. For the year: .281, three homers, 28 RBIs. Jose Martinez, breaking out in St. Louis, went 3-for-4 with his 10th homer in a victory against San Diego. He is batting .327. Gorkys Hernandez, playing regularly in San Francisco, had a 2-for-3 game with two runs in the Giants’ loss to Miami. Hernandez, always a plus defender in center field, is hitting .293 with seven homers. Mallex Smith, another pretty good center fielder, was 2-for-4 with an RBI for Tampa Bay, which beat Toronto. Smith is batting .288 with 12 steals. Luis Avilan has fared well in his middle-relief role for the Chicago White Sox, who have been terrible. He worked a scoreless inning in a loss to Cleveland and trimmed his ERA to 3.26. And Craig Kimbrel just keeps throwing gas for Boston; he struck out the side in the 12th inning against Baltimore to preserve a 2-0 win and notch his 21st save in 23 chances. P.S. Ole Miss alum Drew Pomeranz, who has one win this year for Boston after notching 17 in 2017, remains on the disabled list with no announced timetable for his return. The left-hander last pitched on May 31, when he yielded four runs in five innings and fell to 1-3, 6.81 as Boston lost to Houston 4-2. “I’ll take some positive moving forward and take it into the next one,” he said after that game. He went on the 10-day DL with biceps tendinitis two days later. Pomeranz, who started the season on the DL, has lasted more than five innings in only two of eight starts.