This article is part of our MLB Barometer series.
There are usually a few parts of the MLB calendar that lead to a cluster of prospects arriving in the big leagues together.
The door can open on the first day of the season in which a player can be brought up without accruing a full year of service time (this year, it was April 13).
In other instances, the early weeks of June become a busy time for promotions as Super Two concerns begin to fade.
Of course, roster expansion in September on the first day of the season's final full month is the largest swarm of new talent into the player pool, but many of those players are not prospects, as much as they're guys who could be auditioning for roster spot for the following season.
With the perfect storm of injuries and attrition, a nice group of young pitchers has arrived with regular chances to start for their respective clubs over the last couple of weeks.
Walker Buehler, LA – Buehler was elevated from "yo-yo" status for the Dodgers when Hyun-Jin Ryu was lost to a groin injury that will sideline him until after the All-Star break. Talent-wise, he has the best arsenal of this bunch, but he might face the tightest workload restrictions of the bunch as well, having logged just 98 innings in 2017 as he became further removed from 2015 Tommy John surgery. Buehler was part of a combined no-hitter during the Dodgers' series in Mexico over the weekend, and it he might