The former first round pick, David Peterson went 7 innings allowing only 2 runs while striking out 8 and collecting 16 swings and misses.
Peterson allowed a leadoff double, which eventually came into score on a sac-fly in the first inning. He bounced back by striking out the side in the second inning, he allowed his only other run of the game on a solo homer in the third inning. He struck out 1 in the fourth and another in the fifth. He struck out another in the sixth inning and ended his outing by facing the minimum in the seventh inning.
The slider was the weapon of choice for Peterson versus the Marlins, 9 of the 16 swings and misses came on his slider and 6 of the 8 strikeouts came on his slider. His slider has been his best offering so far this season, it has a -1.6 RV/100, .152 BAA, and a 47.3 whiff%. Peterson has increased his ground ball percentage by 3.5% from last year, that is due to his increase in slider usage (up 4.9% from last year), because his slider has a 55% ground ball percentage. The increase in ground ball percentage has helped Peterson decrease his xERA from 5.96 last year to 3.84 this year.