Premier peak
USBC bowler profile
Gregg G Sietsema
Honors Legend
253-53490
Bowling since 2004
×2
800 series
×7
300 games
×1
11 in a row
230+ peak
200+ career avg
2.5K games
10+ honors
Lifetime average
205.62
Lifetime games
3817
Highest average
230
Career honors
10
What this profile flair means
Premier peak aura
The nameplate aura reflects a highest recorded league average of 230.
Honors Legend
Awarded for reaching at least 10 recognized career honors.
Honor pins
Each pin names a recognized honor and shows how many times it was earned.
Milestone marks
These celebrate peak average, career average, recorded games, and accumulated honors separately.
Historical records
League History
USBC records begin in 2004. Sport and challenge conversions are summarized below.
Recent composite averages
2026
House
2025
House
2022
House
2020
House
2019
House
League averages
2025-2026
Vegas Express
· W
2024-2025
Vegas Express
· S
2021-2022
Alley Cats / River Rats
· W
2019-2020
Vegas Or Bust
· W
Vegas Express
· W
2018-2019
Vegas Express
· W
Vegas Express
· S
Vegas Or Bust
· S
2017-2018
River Magic
· W
River Magic
· S
2016-2017
River Magic
· W
Aces Or Better
· W
Aces Or Better
· S
River Magic
· S
2015-2016
Hits & Misses
· W
Aces Or Better
· W
Aces Or Better
· S
Hits & Misses
· S
River Magic
· S
Lg. Of Our Own
· W
2014-2015
Lg. Of Our Own
· W
Aces Or Better
· W
Strike Me Green
· W
Lg. Of Our Own
· S
Strike Me Green
· S
Vegas Holiday
· W
Aces Or Better
· S
2013-2014
Vegas Holiday
· S
Lg. Of Our Own
· W
Thurs. Niters
· W
Strike Me Green
· S
Aces Or Better
· S
Hits & Misses
· W
Vegas Holiday
· W
Guys & Dolls
· W
2012-2013
Thurs. Niters
· S
Party Down
· W
Thurs. Niters
· W
Party Down
· S
2011-2012
Party Down
· W
Thurs. Niters
· S
Thurs. Niters
· W
Republic Concrete
· W
Party Down
· S
2010-2011
Thurs. Niters
· W
Party Down
· S
Party Down
· W
Thurs. Niters
· S
2009-2010
Party Down
· S
Party Down
· W
Thurs. Niters
· S
Thurs. Niters
· W
4 - 4 Vegas
· S
4 - 4 Vegas
· W
2008-2009
Thurs. Niters
· S
Party Down
· S
Party Down
· W
Thurs. Niters
· W
Sat. Vegas Special
· W
2007-2008
Party Down
· S
Thurs. Niters
· S
Party Down
· W
Double Down
· W
Showboaters
· S
2006-2007
Party Down
· S
Double Down
· S
PBA Experience
· S
Party Down
· W
Double Down
· W
2005-2006
Party Down
· S
Double Down
· S
Double Down
· W
2004-2005
Double Down
· S
Double Down
· W
2003-2004
Double Down
· S
Double Down
· W
USBC standing
Memberships
Citrus Belt USBC
Most recent
Citrus Belt USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Citrus Belt USBC
Past
Orange County USBC
Past
Citrus Belt USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Citrus Belt USBC
Past
Orange County USBC
Past
Orange County USBC
Past
Orange County USBC
Past
San Gabriel Valley BA
Past
Orange Cnty BA
Past
Orange Cnty BA
Past
Career milestones
Honors
0900 series
2800 series
7300 games
111 in a row
800 series
813 series · Tustin Lanes
800 series · Tustin Lanes
300 games
Perfect game · South Point Bowling Center
Perfect game · Tustin Lanes
Perfect game · Tustin Lanes
Perfect game · Tustin Lanes
Perfect game · Tustin Lanes
Perfect game · New Yorba Linda Bowl
Perfect game · Linbrook Bowl
11 in a row
11 consecutive strikes · Bowlero Fullerton
Tournament history
Open Championships
Adjusted entering average
175
How it was calculated
The highest sport-adjusted average from the last three bowling seasons is used until 27 Open Championship games are available.
2024/25203 → 175
The Open Championships average uses the most recent 27 games bowled from 2016 through 2025. Search historical championship scores.