Physical Description: Physical,
mature frame. Minimal remaining projection. Looks heavier than
listed weight of 210 pounds.
Throws from a three-quarters arm slot from the first base side.
Short arm action with significant effort as he comes forward.
Medium leg kick. Hides the ball well in his delivery, keeping it
behind his body until very late. Comes across his body.
Fastball: 93-95 mph. Heavy pitch with late
downward life. Generates weak contact, but can get elevated when
he leaves it up in the zone. Command and control are a work in
progress. Velocity was down considerably at the 2020 Fall
Instructional League, where he sat 89-92 mph.
Slider: 80-83 mph. Short, horizontal break. Does not
consistently snap it off. In 2018, showed a 86-87 mph variation
with more vertical break. At 2020 Fall Instructional League,
velocity was 82-85 mph and pitch lacked bite. Potential
Changeup: 86-88 mph. Firm, lacks feel and
separation from fastball. Looks like a two-seam fastball at
times. Potential below-average offering.
Notes: Was a catcher before converting to pitching late
on in his amateur career. That conversion led to him signing
with the Red Sox as a 20-year-old prior to the 2018 season.
Impressed in the DSL in 2018. Skipped from the DSL to Lowell in
2019. Participated in Fall Instructional League in 2019 and
Summation: As a late signee, De La
Rosa is behind the developmental curve, but he shows interesting
raw stuff for a converted catcher. Arm is very strong and can
dial up his fastball, but currently lacks an average secondary
pitch and command and control have a ways to go. Variations in
velocity seen at 2020 Fall Instructional League merit watching
Scout Chatter (12.4.2020)