Ht: 6'6" Wt: 195 B-T: R-R
Acquired: Signed as a free agent from Venezuela in 2012
FutureSox Prospect Rankings
- #23 - 2015 Preseason
- #29 - 2017 Preseason
Martinez' signing for $250,000 in 2012 was among the first big ones of the Marco Paddy era with the White Sox. 2014 was his first year in pro ball, having skipped DSL and spending time with both White Sox US Rookie affiliates. As a 19-year-old he posted a strong strikeout rate (9.6 K/9) and borderline control (4.0 BB/9, improved during year) in 12 games (58.1 IP) with AZL White Sox and Great Falls. 2015 was his first year in full season ball and he was very up and down, as he worked with pitching coach Jose Bautista on retooling some rough spots and inconsistencies in his delivery. His ERA by month tells the story: 3.29 in April (3 starts), 9.95 in May (5), 5.17 in June (4), 1.52 in July (5), and 7.34 in August/September (7). In 2016 he repeated Kannapolis as a 21-year old and he improved statistically in basically every category, finishing with a 3.81 ERA, good control (3.4 BB/9) and striking out more than a batter per inning. Martinez appeared poised to move up in 2017, but he struggled pretty badly in High-A (16 IP, 25 H, 16 R, 10 BB, 8 K) and was demoted back to Low-A. There he posted a 3.19 ERA with strong peripherals in 14 starts. 2018 has Martinez in Winston-Salem's rotation again for his age 23 season.
Martinez' fastball has been as high as mid-90's, but now getting more consistent he's typically 90-93 but with improved command. He's also got a slider and a change, with the latter pitch starting to show some good fade and a consistent release to properly mask it. Physically he is long (6'6" or maybe taller) and lanky, putting more tax on his ability to deliver consistently. As he gets used to his changed delivery and puts on strength he has some room to improve, and he's still somewhat young. His slider does show good movement at times but, per those who watch him regularly, is still inconsistent. Martinez will likely be in the Winston-Salem rotation in 2018 for his age 23 campaign.
Major League Outlook: Back end starter ceiling, but a late inning reliever may be more likely