This article is part of our Minor League Barometer series.
Several notable minor leaguers have made their way to the bigs over the past week or so. Two former high-profile hurlers started their first MLB games Monday, as Touki Toussaint brought his blazing fastball to the Braves, while Sean Reid-Foley took the hill for the Blue Jays. Meanwhile, the rebuilding Orioles saw a dazzling debut from toolsy outfielder Cedric Mullins, who went 3-for 4 with two RBI and three runs. Mullins should start in center field for the remainder of the season.
However, the true phenoms are being held back for the time being — specifically Vladimir Guerrero Jr., Michael Kopech and Eloy Jimenez. Vlad Jr. is "only" hitting .400 on the season, though a knee injury robbed him of a month and could serve as an excuse for the Blue Jays to let him finish off the 2018 campaign in the minors. The fireballing Kopech was supposed to be working on control issues, though he hasn't walked a batter in three of his last four starts at Triple-A. He also leads the International League in strikeouts by a wide margin. Jimenez also missed some time earlier this season due to injury but is hitting .354 at Triple-A with 10 home runs in 34 games. Of the trio, he might be the closest to getting promoted. Gaining an extra year of team control is a big deal with these superstar players, but in terms of production, there is no question that all three belong in the majors