The Milwaukee Brewers welcomed top pitching prospect Jacob Misiorowski to the big leagues on Thursday, as he took the mound for his first MLB start. Misiorowski wasted no time showing fans exactly why he was such a heralded prospect.

MILWAUKEE – Top Brewers pitching prospect Jacob Misiorowski is bringing his 6-foot-7 frame and 103 mph fastball to American Family Field, where he’s expected to begin his career against a division rival.

The Brewers' top-ranked pitching prospect, No. 4 overall in the Milwaukee farm system, took the hill at American Family Field to face Cardinals leadoff hitter Lars Nootbar — and promptly fired three straight fastballs topping 100 mph.

The Milwaukee Brewers received injury news on Friday. Milwaukee's promising young pitcher left his Major League debut under concerning circumstances on Thursday

MLB rookie class has been a bit of a letdown to this point, but that could change in the coming weeks thanks to an influx of exciting young talent arriving in the majors.

The Brewers are now in the midst of making difficult decisions while they move around pitchers in the rotation and the bullpen.

Civale is 1-2 with a 4.91 ERA in five starts this season, but his spot in the rotation came into question once the Brewers opted for the future by promoting MLB.com’s No. 68 prospect in Misiorowski.

There has been a run of exciting call-ups within the last month, starting with Jordan Lawlar and continuing with Dalton Rushing, Marcelo Mayer, Jac Caglianone and the most hyped of them all: Roman Anthony. He occupies the No. 1 spot in MLB Pipeline's top 100, while Lawlar (No. 4), Mayer (No. 8) and Caglianone (No. 10) are likewise in the top 10.

Now, Chad Patrick sits atop the rookie leaderboards in the National League. Despite his club’s 2-0 loss to the San Diego Padres on June 6, Patrick continued his unexpected ascent through the ranks of Major League Baseball’s rookie class with one run allowed and six strikeouts over six innings.