Player record

Mason, William

ID 51407WAMaleInactive
Current rating1,635
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Wins

433

Indexed tournament wins

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

DateTournamentRating inRating afterPoints changedRecord
Apr 26, 1997Tri-City Spring RRTournament · View matches1,7731,720-53+8 / -616W / 4L
Dec 22, 19961996 U.S. NationalsTournament · View matches1,6781,773+9514W / 11L
Nov 10, 1996Pacific Rim OpenTournament · View matches1,7041,678-260W / 6L
Oct 12, 1996Tri-Cities Octoberfest RRTournament · View matches1,6931,704+11+19 / -86W / 4L
Jun 23, 1996Rose City OpenTournament · View matches1,7061,693-133W / 4L
May 5, 19961996 Seattle OpenTournament · View matches1,7431,706-375W / 5L
Apr 20, 1996Tri-City RRTournament · View matches1,7561,743-134W / 4L
Dec 18, 1995USATT National ChampionshipsTournament · View matches1,7471,756+9+33 / -245W / 7L
Nov 5, 1995Pacific Rim OpenTournament · View matches1,7661,752-143W / 7L
Sep 23, 1995Northwest Team & Open TTCTournament · View matches1,7771,766-11+0 / -111W / 2L
Aug 19, 1995Portland OpenTournament · View matches1,7201,777+57+76 / -196W / 5L
Jun 18, 1995Rose City OpenTournament · View matches1,7481,720-283W / 5L
Nov 13, 1994Pacific Rim OpenTournament · View matches1,7331,748+156W / 7L
Aug 20, 1994Portland OpenTournament · View matches1,7931,733-605W / 3L
Jun 19, 1994Rose City OpenTournament · View matches1,7991,793-6+43 / -499W / 5L