"Knocking Down The Door" is the phrase I use to describe players on the verge of a big league call-up based on their strong performance in the upper minors.
In many cases, however, it can still take an injury to finally open that door, as was the case this week with Pittsburgh Pirates' top pitching prospect Gerrit Cole.
The 22-year-old debuted on Tuesday after Wandy Rodriguez was scratched due to a forearm injury, but he was already making a strong case to join the Pirates, whether there was a spot available or not.
He hadn't allowed run in his last 19 innings at Triple-A , which is a heck of a way to end his minor league career if he were never to return. After beating the Giants with an impressive performance (6.2 IP, 2 ER, 7 H, 0 BB, 2 K), that could very well be the case for Cole.
Here are eight more top prospects who are currently trying to "knock down the door" and could be the next to join Cole in the majors.