Luis Heredia made his minor league debut in 2011, going 1-2 with an earned run average of 4.75 in 12 games.
He was only 16 at the time.
Now, the 19-year-old is pitching for Class A West Virginia Power, but he has struggled early on in 2014. In eight starts, the righty is 1-2 with a 4.54 ERA.
Pitching for West Virginia in 2013, Heredia was dominant, going 7-3 with a 3.05 ERA in 14 games pitched.
So, what is the problem this season? Let's take a look at his strengths and weaknesses.
Strengths: Solid frame, Ability to strike out batters
According to Baseball Reference, Heredia stands tall at 6'6" and 205 pounds.
In 2013, Heredia struck out an average of 7.6 batters per nine innings pitched. This year, however, his numbers are down in almost all categories.
Weaknesses: Lack of control, Tendency to give up the long ball, Potential arm trouble
Over his last two seasons, Heredia has consistently struggled to find the plate, and his high number of walks has hurt his performance.
In 2013, Heredia walked 37 batters in 65.0 innings pitched. That equates to an average of a whopping 5.1 walks per nine innings pitched.
This season, things haven't improved. In 35.2 innings pitched, Heredia has surrendered 18 free passes, which is an average of 4.5 walks per nine innings.
Heredia has also given up five home runs in eight starts this season, which may not seem like a terrible statistic, however, he has allowed two home runs in two separate starts. He also has allowed five earned runs in both of those starts.
According to Jake Seiner of MiLB.com, Heredia left a game in early April after throwing only one pitch due to discomfort in his right shoulder.
Since that day, no setbacks have occurred, and Heredia has continued to make his scheduled starts.
Perhaps there is an underlying issue with his shoulder that is causing his stuff to be ineffective. Either way, the Pirates have to be hoping that the organization's No. 10 prospect doesn't turn out to be a bust.