For Mikolas, the things to note are his HRs and low K%. He's given up at least 1 HR in 7 out of 10 appearances, but he's given up multiple homers only twice. He's not walked an exceptional number of hitters but he's not someone who Ks his way out of trouble often. He's been slightly more effective his last 3 games (2 starts, one with an opener), with a 4.40 ERA / 5.19 FIP over 14.1 IP. With the high GB%, he needs his best IF play.
Elder is having a better year than his won / loss record, which is kind of surprising in that the Barves have had a strong start. This game features the 2 highest scoring teams so far this year (280 & 276).
Michael Harris II is having a breakout year, while Dom Smith is contributing offensively (154 wRC+).