Background
Miller comes from Brownwood, Texas and attended the local high school. He had an impressive high-school career as he threw four no-hitters and a perfect game.
As a senior, he really caught the attention of major league scouts, pitching to a 1.90 ERA and recorded 153 Ks in 77 2/3 IP. Even more important was that he had a fastball that reached 97 mph as an 18 year old.
Although he was committed to play college ball at Texas A&M, he elected to sign with the Cardinals, who selected him as the 19th overall pick in the 2009 MLB Draft. In 2012, he competed for a major league roster spot, but failed to make the team. Instead, he was relegated to AAA.
He entered that year as the fifth-ranked prospect in the league, and despite pitching to a 4.74 ERA, he was called up in September and pitched against the New York Mets. He made the Opening Day roster the following season and has pitched to a 2.02 ERA, 65 Ks and 16 BBs in 62.1 IP and 10 games started.
Profile
Miller has an athletic build as he also played football (tight end and defensive end) in high school. At 6-3 and 200 pounds, he has a frame that allows him to pitch at high velocity without too much effort.
Most importantly, he has a clean arm action and is able to repeat his delivery consistently. This allows for good pitch location and projects as a relatively low injury risk delivery.
He is also known as a fiery competitor and is always looking to improve. This personality type as well as his physical attributes reflect all of the traits that make up a future ace.
Pitches
Fastball - Max Velocity: 98 mph | Average Velocity: 92-94
In the minors, he primarily used his four-seamer, but now is starting to trust his two-seamer. The four-seamer is more explosive, but the two-seamer has a good diving action. The biggest aide to his fastball is Miller's confidence and willingness to pitch inside.
Off-speed - Has a curve that is 12-6 with late breaking action. His change-up is his weakest pitch as it is more or less straight, but the speed differential between this pitch and his fastballs makes it an effective pitch.
Highlights
He gave up a single to the first batter he saw and then retired 27 straight. He struck out 13 Rockies that night. Here is the video below:
Video of another dominant start by Miller: