The struggling Marlins need help in the rotation, but young help will not called up for at least the next 2 seasons at least for this one prospect. Tyler Kolek is the Marlins’ number 1 ranked prospect in the Marlins’ system. Kolek is also ranked 52nd in the MLB’s best prospect board. Kolek was selected 2nd overall in the 2014 MLB Draft. Kolek had his first full season in the minors, but had a up and down season. Kolek pitched in the GCL league (Rookie Ball) and posted a record of 4-10 (25 starts) with a 4.56 ERA in 108.2 innings. Kolek struck out 81 batters, but the concern is the amount of walks (61). Kolek only gave up 7 homers which is impressive. The Texas native average at least 5 innings a game with usually 5 to 6 strikeouts to go along with those innings. Kolek is a big boy and there are still some questions if he will be a starter in the future or a back end of the bullpen guy. Time will tell, but right now he will remain a starter.
In addition, Kolek has pure velocity, but also gets heavy sinking life on his fastball, creating lots of groundballs. Kolek has retooled his breaking ball since being drafted. He changed his sweeping curve to a 12-6 curve. He does need to continue to work on his secondary offerings, as he’s largely been able to rely on his fastball to this point. He has good command of his fastball, but needs to lower the walks if he wants to be a big time starter or high end starter. What will help him become a top starter will be his size, stuff and arm strength to help him top off his potential.
Note: Kolek can throw his fastball over 100 MPH.