Born: January 9, 1998
Height: 6’6″
Weight: 225
Bats: Right
Throws: Right
Drafted: 6th Round, 184th Overall, 2019
How Acquired: Draft
College: Stanford University


Matthiessen was a two-way player at Stanford.  The Pirates announced him as a right fielder and that seemed to be the preference of most scouts, due to potential for increased power if he improves his approach at the plate.  He’s become strictly a first baseman in the Pirates’ system.  As a junior, he was Stanford’s second best hitter, posting a 322/399/553 line, with a dozen home runs.  Strikeouts, though, are a problem; he fanned in a quarter of his ABs.  Matthiessen didn’t play regularly in his sophomore year but had seven home runs and slugged .598.  He didn’t bat at all as a freshman.  As a pitcher in his junior year, he fanned 55 in 53.1 IP in a swing role, with an ERA of 3.71.  He signed for $2500 under the slot value.

A-:  220/303/340, 159 AB, 5 2B, 1 3B, 4 HR, 18 BB, 46 K, 2-2 SB

Matthiessen played for West Virginia, where he split his time between first base and right field.  Like nearly all of the Pirates’ college position player draftees in recent years, he struggled at the plate in the New York-Penn League.  He did show a little power, but struck out in over a quarter of his plate appearances.  His numbers were close to the league averages of 232/313/337, but you’d like something better than that from a corner player.


Ideally, a sixth round pick out of college would be able to head to high A for his first full year, but Matthiessen struggled enough that he might have ended up at Greensboro if there’d been a 2020 season.  What will happen after the lost year is harder to say.  It’d help if Matthiessen could play first going forward, to relieve the lower-level logjam in the outfield, but he’ll have to hit a lot better.

2021: Minor league contract
Signing Bonus: $261,200
MiLB Debut: 2019
MLB Debut:
MiLB FA Eligible: 2025
MLB FA Eligible:
Rule 5 Eligible: 2022
Added to 40-Man:
Options Remaining: 3
MLB Service Time: 0.000
June 4, 2019: Drafted by the Pittsburgh Pirates in the 6th round, 184th overall pick; signed on June 17.