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Ken Naffziger

Portland, OR
2.5C year-end 2025
29 matches · 13W–16L · seasons 20192026
Bump probability
2.02.53.0lowhigh

Where this rating stands today. Taller means more likely. The dashed lines are the band edges, and the three shaded areas are the three percentages below.

2.54
estimated dynamic rating
Where the rating sits now, on 14 matches this season · USTA never publishes this number
0%
down to 2.0
29%
stay 2.5
71%
up to 3.0
Projected to December: 0% down · 73% stay · 27% up, from a year-end estimate of 2.45. Lower than today’s 2.54 because form regresses — players this far above their band partway through a season have historically finished nearer the middle of it. Keep playing at this level and the numbers above are the ones that hold.

A 2.5 runs from 2.01 to 2.50. This rating sits in the top of the band, and every match moves it.

Our estimate, not a USTA figure — scale measured at this point of 2023 on 2160 players. Graded publicly in December when USTA publishes year-end ratings. It moves when you play, and occasionally when we improve the model.

Where you rank
Portland · 2.5
15 of 34
OR · 2.5
28 of 61

Ken is ranked among players at the same level in the same place, by our estimated dynamic rating — not the published level, which is the same for everyone in the band. Groups smaller than five are not ranked, because a placing out of two is noise dressed as standing.

Teams12 teams · 2019–2026
Over timerating by season, and how you rank
Rating by season

Ken has played at 3.0, 2.5 across 3 seasons — 0 moves up and 1 down.

2.02.53.0201920242026

The line is our estimate; the horizontal lines are level boundaries, so crossing one is a bump. Hollow points are years we inferred from the level played the following season, because USTA publishes a current rating but no history. The smaller, faded points — 2019 — rest on fewer than 5 matches, where the estimate is mostly the level the player was entered at rather than anything they did on court. Read the shape, not the value.

How you rank at your level

Percentile compares the same level in the same season, by share of games won. Mixed is shown for context — USTA rules exclude it from your adult rating unless mixed is all you play.

By level5 levels played
2.5
87.5%
7W–1L · 65.4% of games
3.0
1W–2L
not enough matches yet
6.0
1W–2L
not enough matches yet
2.5mixed
0W–2L
not enough matches yet
6.0mixed
30.8%
4W–9L · 44.3% of games

Games won matters more than matches won — NTRP adjusts on margins.

Match history29 matches
L
Julie Hoxie / Jason Leemixed
2026-07-19 · IRV-Gilbertson/Salada · #1 Doubles · 2.5 · with Irene Gilbertson
+0.000below expectation — took 20% of games against 40% expected
6-2, 6-1
L
Suk Chung / Woojin Leemixed
2026-06-28 · IRV-Gilbertson/Salada · #2 Doubles · 2.5 · with Irene Gilbertson
+0.000below expectation — took 42% of games against 48% expected
6-2, 4-6, 1-0
W
Ty Bair / Miles Lovato
2026-06-05 · IRV-Salada/Walker · #1 Doubles · 2.5 · with Paul Cedfeldt
+0.046better than expected — took 80% of games against 55% expected
6-1, 6-2
W
Shujian Li / Zeye Li
2026-05-23 · IRV-Salada/Walker · #1 Doubles · 2.5 · with Jon Lavietes
+0.019better than expected — took 52% of games against 45% expected
4-6, 6-4, 1-0
W
David Ruark / Scott Peck
2026-05-08 · IRV-Salada/Walker · #1 Doubles · 2.5 · with Jon Lavietes
+0.007better than expected — took 67% of games against 60% expected
6-4, 6-2
L
Patrick Koeberl / Krishna Kasturi
2026-04-04 · IRV-Salada/Walker · #1 Doubles · 2.5 · with Paul Walker
0.042below expectation — took 33% of games against 54% expected
6-3, 6-3
W
Ricardo Ascazubi / Krishna Kasturi
2026-03-21 · N OR-IRV-Salada · #1 Doubles · 2.5 · with Jimmy Stillman
0.015below expectation — took 50% of games against 57% expected
3-6, 6-4, 1-0
W
Jamaal Anthony / Matthew Philbrook
2026-02-21 · N OR-IRV-Salada · #1 Doubles · 2.5 · with Troy KonigWilcox
+0.064better than expected — took 86% of games against 51% expected
6-0, 6-2
W
Robert Hrdinsky / Todd Burch
2026-01-24 · N OR-IRV-Salada · #1 Doubles · 2.5 · with GREGORY NAULTY
+0.063better than expected — took 92% of games against 56% expected
6-1, 6-0
W
ROSS GREEN / Aaron Geiger
2026-01-03 · N OR-IRV-Salada · #1 Doubles · 2.5 · with Jon Lavietes
+0.071better than expected — took 86% of games against 48% expected
6-1, 6-1
L
2025-11-02 · IRV-LaMontagne · #1 Doubles · 6.0 · with Joel Greenblum
+0.027better than expected — took 38% of games against 32% expected
6-7, 6-1, 1-0
L
Bishu Guha / Sloane Klonskymixed
2025-11-01 · IRV-Lewis/Seidel 2 6.0 · #3 Doubles · 6.0 · with Kate Quisling
+0.000below expectation — took 14% of games against 29% expected
6-2, 6-0
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Not affiliated with or endorsed by the USTA. Rating shown is the published USTA year-end figure; match data is from USTA TennisLink.