Wins
433
Indexed tournament wins
Player record
Mason, William
Losses
419
Indexed tournament losses
Matches
852
Decisive results
Win rate
50.8%
Across indexed matches
Peak rating
1,856
Highest rating in the available history.
Biggest upset
Ping, Ken
Tri-City open Fall Double RR · Oct 21, 2001 · +368 rating
Open →Biggest loss
Rob Clark
2003 Bellevue Open · Mar 30, 2003 · -658 rating
Open →Most frequent opponent
Mark Kobernick
21 matches
Open →Rating trajectory
Published rating movement across recorded events.
Tournament history
75 tournament appearances · synced Aug 8, 2026, 2:17 AM
| Date | Tournament | Rating in | Rating after | Points changed | Record |
|---|---|---|---|---|---|
| Nov 6, 2005 | Viducich Stiga Pacific Rim OpeTournament · View matches | 1,653 | 1,635 | -18+0 / -18 | 0W / 5L |
| Oct 16, 2005 | Tri-Cities Fall Open Dbl. RRTournament · View matches | 1,649 | 1,653 | +4+17 / -13 | 10W / 3L |
| Jun 18, 2005 | 2005 Rose City OpenTournament · View matches | 1,654 | 1,649 | -5+35 / -40 | 4W / 7L |
| Apr 17, 2005 | Tri-Cities Spring Open Dbl. RRTournament · View matches | 1,673 | 1,654 | -19+19 / -38 | 10W / 7L |
| Nov 14, 2004 | Viducich Stiga Pacific Rim OpenTournament · View matches · USATT readjusted 1,574 → 1,630 | 1,574 | 1,673 | +43+43 / 0 | 3W / 4L |
| Oct 31, 2004 | 2004 Bellevue Fall OpenTournament · View matches | 1,592 | 1,574 | -18 | 8W / 7L |
| Oct 17, 2004 | Tri-Cities Fall Open Double RRTournament · View matches | 1,646 | 1,592 | -54+16 / -70 | 10W / 6L |
| Oct 8, 2004 | Huntsman World Senior GamesTournament · View matches | 1,631 | 1,646 | +15 | 4W / 6L |
| Nov 23, 2003 | 2003 Bellevue Fall OpenTournament · View matches | 1,529 | 1,631 | +102 | 12W / 6L |
| Oct 26, 2003 | Viducich Stiga Pacific Rim OpenTournament · View matches | 1,531 | 1,529 | -2+0 / -2 | 0W / 1L |
| Oct 19, 2003 | Tri Cities Fall Open Double RRTournament · View matches | 1,524 | 1,531 | +7+52 / -45 | 8W / 8L |
| Aug 17, 2003 | Portland Summer OpenTournament · View matches | 1,508 | 1,524 | +16+25 / -9 | 9W / 6L |
| Jun 8, 2003 | Paddle Palace 2003 Seattle OpenTournament · View matches | 1,539 | 1,508 | -31 | 5W / 9L |
| Apr 27, 2003 | Rose City Open TT TournamentTournament · View matches | 1,528 | 1,539 | +11 | 8W / 13L |
| Apr 6, 2003 | Tri Cities Spring OpenTournament · View matches | 1,596 | 1,528 | -68+14 / -82 | 10W / 6L |
| Mar 30, 2003 | 2003 Bellevue OpenTournament · View matches | 1,554 | 1,596 | +42 | 6W / 9L |
| Dec 15, 2002 | Mayo Rolph CupTournament · View matches | 1,574 | 1,554 | -20+0 / -20 | 4W / 7L |
| Nov 10, 2002 | Stiga Pacific Rim OpenTournament · View matches | 1,591 | 1,574 | -17 | 1W / 2L |
| Oct 20, 2002 | Tri-Cities Fall Open Double RRTournament · View matches | 1,576 | 1,591 | +15 | 11W / 5L |
| Sep 8, 2002 | Back to School OpenTournament · View matches | 1,585 | 1,576 | -9+7 / -16 | 5W / 7L |
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