Jen-Ho Tseng | Rank: 21 (Preseason: NR)
Team: Iowa Cubs (AAA) ETA: 2018
Position: RHP Age: 22 DOB: 10/03/1994
Bats: L Throws: R Height: 6' 1" Weight: 195 lb.
Signed: July 25, 2013 - CHC
Scouting grades: Fastball: 45 | Curveball: 55 | Changeup: 55 | Control: 55 | Overall: 45
Tseng impressed scouts when he starred for Taiwan at the 18-and-under World Championships in the fall of 2012, but his stock fell when his stuff and delivery took a downturn at the World Baseball Classic the following spring. The Cubs still signed him for $1,625,000 as part of their 2013 international binge that also included since-traded stud prospects Gleyber Torres and Eloy Jimenez. After Tseng made a successful 2014 pro debut in low Class A, his stuff regressed the next two years before bouncing back in 2017.
Tseng's fastball dropped to the upper 80s in 2015-16 before climbing back to 90-93 mph this season. His fastball lacks life but he compensates by locating it well to both sides of the plate. He also has regained consistency with his changeup, his best pitch and a plus offering at its best.
His tight curveball gives Tseng another solid secondary pitch. He's not afraid to challenge hitters and generally keeps the ball down in the strike zone, a must for a flyball pitcher with less-than-overpowering stuff. While he doesn't have a huge ceiling, he's one of Chicago's more advanced rotation prospects and has a safe floor as a back-of-the-rotation starter.
Dillon Maples | Rank: 22 (Preseason: NR)
Team: Tennessee Smokies (AA) ETA: 2018
Position: RHP Age: 25 DOB: 05/09/1992
Bats: R Throws: R Height: 6' 2" Weight: 225 lb.
Drafted: 2011, 14th (429) - CHC
Scouting grades: Fastball: 75 | Slider: 65 | Curveball: 60 | Control: 40 | Overall: 45
Maples' talent could have landed him in the second round of the 2011 Draft, but his strong commitment to pitch and also kick for the football team at North Carolina dropped him to the 14th round. The Cubs signed him at the deadline for $2.5 million, still a Draft record for after the third round, then watched him flounder with control issues and minor injuries for his first five pro seasons. He has broken out in 2017, blowing away hitters with three power pitches and finally reaching Double-A.
Maples is throwing better than ever, ranging from 94-100 mph with a fastball that has some run and sink. When it was trying to develop him as a starter, Chicago had him concentrate on improving his fastball command, which cost him some feel for his curveball, his best offering as an amateur. His hard downer curve in the lower 80s is back in his arsenal, and he also has developed an upper-80s slider that's even more of a wipeout pitch.
Though he's a good athlete, Maples never has had a pretty delivery and still struggles to find the strike zone. If he can acquire even average control, he could become a closer. While that may be too much to ask, he has the pure stuff to help the Cubs in the near future.