Player record

O'Brien, Joseph

ID 53403CAMaleInactive
Current rating1,440
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Wins

5

Indexed tournament wins

Losses

7

Indexed tournament losses

Matches

12

Decisive results

Win rate

41.7%

Across indexed matches

Peak rating

1,444

Highest rating in the available history.

Biggest upset

Siqueiros, Antonio

Pacific Coast Open · Nov 20, 1994 · +98 rating

Open →

Biggest loss

Ekmekjian, Vahe

Pacific Coast Open · Nov 20, 1994 · -166 rating

Open →

Most frequent opponent

Beaumont, John

1 matches

Open →

Rating trajectory

Published rating movement across recorded events.

Tournament history

2 tournament appearances · synced Aug 8, 2026, 2:18 AM

DateTournamentRating inRating afterPoints changedRecord
Nov 20, 1994Pacific Coast OpenTournament · View matches1,4441,440-4+24 / -283W / 3L
Jul 4, 1994US OpenTournament · View matches1,4411,444+3+10 / -72W / 4L