BowlerProfiles
Ranking
Competitive peak
USBC bowler profile

Marshall Mastenbrock

League Competitor
8970-199270 Bowling since 2021
180+ peak 160+ career avg 100 games
Lifetime average 168.25 Across all recorded seasons
Lifetime games 186 USBC-recorded games
Highest average 181 45 games
Career honors 0 Recognized achievements
What this profile flair means
Competitive peak aura

The nameplate aura reflects a highest recorded league average of 181.

League Competitor

The starting title for a bowler with recorded league history.

Honor pins

Pins appear after a recognized 300 game, 800 or 900 series, or 11-in-a-row award.

Milestone marks

These celebrate peak average, career average, recorded games, and accumulated honors separately.

Roster matching

League Finder

Start with one bowling center, then expand across the region. Matches use name, average, gender, game count, and league history when available.

Beta
These are evidence-based suggestions, not confirmed identities. Your “likely” or “unlikely” choices last only for this browser tab and are never attached to the profile.
Choose a region and bowling center to begin.
Historical records

League History

USBC records begin in 2021. Sport and challenge conversions are summarized below.

Recent composite averages

2026 House
171 average · 147 games
2025 House
158 average · 36 games
2021 House
167 average · 3 games

League averages

2025-2026

Valentine Funtime 3 · S
Data not found
Summer Tuesday Shooters · S
181 average · 45 games
Tuesday Shooters · W
167 average · 102 games

2024-2025

Summer Tuesday Shooters · S
158 average · 36 games

2020-2021

Sunday Shooters · S
167 average · 3 games
USBC standing

Memberships

Not currently active
Contra Costa County USBC Most recent
2025-08-01 — 2026-07-31
Contra Costa County USBC Past
2024-08-01 — 2025-07-31
Contra Costa County USBC Past
2024-08-01 — 2025-07-31
Contra Costa County USBC Past
2020-08-01 — 2021-07-31
Career milestones

Honors

0900 series
0800 series
0300 games
011 in a row
Tournament history

Open Championships

Adjusted entering average 157 Fewer than 27 recorded Open Championship games

How it was calculated

The highest sport-adjusted average from the last three bowling seasons is used until 27 Open Championship games are available.

2025/26181 → 157

The Open Championships average uses the most recent 27 games bowled from 2016 through 2025. Search historical championship scores.