Leagues

    USBC has data for Eric S Adolphson starting from 2002.
    Sport/Challenge average conversions are located at the bottom of the page.

    Recent Composite Averages

    2025: 221 over 102 games (House)
    2024: 221 over 108 games (House)
    2023: 219 over 107 games (House)
    2022: 223 over 132 games (House)
    2021: 230 over 54 games (House)

    League Averages

    2025-2026

  • Bowlers Experience.-Markstein 635 Scratch Tr (W) - data not found

    2024-2025

  • Sutherland Tax Service.-Markstein Sales Scratch Tr (W) - 221 over 102 games

    2023-2024

  • Amtec Ind.-Markstein Sales Trios (W) - 221 over 108 games

    2022-2023

  • Scratch Draft Trios (S) - 236 over 8 games
    Amtec Ind.-Markstein Sales Trios (W) - 219 over 96 games
    Dublin790 Majors (W) - 201 over 3 games

    2021-2022

  • Nisei Invitational (S) - 227 over 36 games
    Amtec Ind.-Markstein Sales Trios (W) - 221 over 96 games

    2020-2021

  • 2021 Summer Nisei Invitational (S) - 230 over 54 games

    2019-2020

  • Black Oak Trios (W) - 224 over 75 games

    2018-2019

  • Black Oak Trios W-17-18 (W) - 230 over 99 games

    2017-2018

  • 2018 Sum Nisei Invitational (S) - data not found
    Clayton Valley 765 Scratch (W) - 228 over 6 games
    Black Oak Trios W-17-18 (W) - 226 over 105 games
    P B A Exp. Wtr. (W) - 193 over 12 games

    2016-2017

  • 2017 Sum Nisei Invitational (S) - 237 over 42 games
    Black Oak Trios W-16-17 (W) - 222 over 102 games

    2015-2016

  • 2016 Sum Nisei Invitational (S) - 221 over 48 games
    Black Oak Trios W-15-16 (W) - 221 over 102 games

    2014-2015

  • Black Oak Trios (W) - 228 over 9 games
    Dublin Majors (W) - 210 over 15 games
    2016 Sum Nisei Invitational (S) - 208 over 48 games

    2013-2014

  • Dublin Majors (W) - 214 over 15 games
    2014 Sum Nisei Invitational (S) - 210 over 45 games

    2012-2013

  • Nisei Invitational Trios (S) - 208 over 42 games
    Tri-City 975 Scratch (W) - 181 over 3 games

    2003-2004

  • Hoffmann Invitational (W) - data not found

    2001-2002

  • Hoffmann Invitational (W) - 147 over 71 games


Memberships

    Eric S Adolphson has an active USBC membership.

    Current:

    Alameda County USBC - 2025-08-01 - 2026-07-31

    Past:

    Alameda County USBC - 2024-08-01 - 2025-07-31
    Alameda County USBC - 2023-08-01 - 2024-07-31
    Alameda County USBC - 2022-08-01 - 2023-07-31
    Alameda County USBC - 2021-08-01 - 2022-07-31
    Alameda County USBC - 2020-08-01 - 2021-07-31
    Alameda County USBC - 2019-08-01 - 2020-07-31
    Alameda County USBC - 2018-08-01 - 2019-07-31
    Alameda County USBC - 2017-08-01 - 2018-07-31
    Contra Costa County USBC - 2017-08-01 - 2018-07-31
    Alameda County USBC - 2016-08-01 - 2017-07-31
    Alameda County USBC - 2015-08-01 - 2016-07-31
    Alameda County USBC - 2014-08-01 - 2015-07-31
    Alameda County USBC - 2013-08-01 - 2014-07-31
    Alameda County USBC - 2012-08-01 - 2013-07-31
    Contra Costa County USBC - 2012-08-01 - 2013-07-31
    Marin Cnty BA - 2003-08-01 - 2004-07-31
    Contra Costa County BA - 2002-08-01 - 2003-07-31
    Marin Cnty BA - 2001-08-01 - 2002-07-31
    PBA Sport Bowlers - 2001-08-01 - 2002-07-31

Honors

800 series (2)

  • 838 on February 27 2024 at Earl Anthony's Dublin Bowl - Games: 288-261-289
  • 823 on March 7 2022 at The Orleans - Games: 279-244-300


  • 300 games (5)

  • 300 (Game 1) on September 2 2025 at Earl Anthony's Dublin Bowl - Games: 300-257-194
  • 300 (Game 1) on March 29 2022 at Earl Anthony's Dublin Bowl - Games: 300-247-188
  • 300 (Game 3) on March 7 2022 at The Orleans - Games: 279-244-300
  • 300 (Game 3) on October 1 2019 at Earl Anthony's Dublin Bowl - Games: 193-183-300
  • 300 (Game 3) on August 16 2017 at Earl Anthony's Dublin Bowl - Games: 216-257-300


  • Open Championships

    Entering Average: 192

    Why?

    If a bowler does not have a 27 game Open Championship Average, use the Highest Sport Adjusted Average of the last three bowling seasons.
    You currently have bowled 18 games out of the required 27.

    The Math

    Highest league is from: 2024/25
    221 (standard) -> 192 (sport)

    Open Championships average is the most recent 27 games bowled at the Open Championships from 2016 through 2025. To search historical scores from the Open Championships Leaderboard click here.

    IGBO TAD

    ( gms)



    Tournaments

    This average is from Feb 1, 2025 until Feb 1, 2026.