Field Insider
20.9
Ratingi
16.2
Seasoni
1.8
Valuei

based on the 2025 season · updated 18 Aug 2026

Profile

Full nameCharles Robbins Mertz Jr.
PositionAttacking midfielder
NationalityUSA
Age29
Date of birth4 Dec 1996
BirthplacePittsburgh
Height170 cm
Shirt number#14
ClubPittsburgh Riverhounds
More about R. Mertz →
Attacking midfielder

Season stats

Full career & schedule →
15
Appearances
4
Goals
1
Assists
1281
Minutes

Domestic-league season · Pittsburgh Riverhounds.

Scout report

Squad depthAttacking midfielder

R. Mertz is a 29-year-old attacking midfielder at Pittsburgh Riverhounds, rated 20.6 overall by Field Insider's model, ranking 152nd of 257 on scout potential in the USL Championship. An experienced operator, he has been a rotation option this season (41.9% of available minutes). He brings 0.35 goal contributions per 90 (0.28 goals, 0.07 assists). Below: strengths, watch-points, market-value outlook and the latest transfer news on Mertz.

Judged on this season alone, Mertz graded 16 — a workmanlike campaign that ranks 16th of 26 of the 26 attacking midfielders in the USL Championship, on 4 goals and 1 assist in 15 appearances (0.351 involvements per 90).

We hold a single season for Mertz, so there's no year-on-year comparison to draw yet — the read above is this campaign only.

On long-term talent our Rating reads 21, 18th of 26 of the 26 attacking midfielders in the USL Championship. At 29 Mertz is in his prime years, and a market index of 1.8 reflects that trajectory.

Current potential18th of 26 attacking midfielders · USL ChampionshipCurrent season16th of 26 attacking midfielders · USL Championship16th-best attacking midfielder in the USL Championship152nd in the USL Championship · potential18th-highest potential attacking midfielder in the USL Championship
20.6
Ratingi
18th of 26 attacking midfielders
16.2
Seasoni
below regular-starter level
41.9%
Minutes
rotation minutes
0.35
Goal contrib / 90
productive for the role

Output in context · Pittsburgh Riverhounds finished 6th of 12 · a mid-table side

15
Apps
4
Goals
1
Assists
5
G+A
0.27
Goals / app

4 goals in 15 appearances (0.27 per game) — light end product the role wants to see climb. Add 1 assist for 5 goal contributions in all.

Strengths

  • Final-third output. 0.35 goal contributions per 90 (0.28 goals, 0.07 assists) — productive for the role.

Watch points

  • Game time. Only 41.9% of available minutes — needs a settled run to prove the level.
  • Level. Rates below a nailed-on top-tier starter on our model.

Outlook

With a Rating of 20.6, Mertz carries the 18th-highest potential of the attacking midfielders in the USL Championship of 26. In the final third he profiles as a productive contributor (0.35 goal contributions per 90). Experienced and reliable, but the value curve is easing (1.1× now → 0.8× projected in three years).

Generated from Field Insider's rating model · AI-written analysis to follow.

Season statistics

Bars = where he ranks among attacking midfielders in the USL Championship with 600+ minutes this season.

Shooting

Goals4

Passing

Assists1

Defending

Tackles26
Interceptions4
Blocks3

Yellow/red cards

Yellow cards2
Red cards0

Transfer news

No transfer news found for this player.