Syvar was a Vulcan Starfleet science officer in the later 24th century. He considered himself a highly skilled darts player, almost un-Vulcanly so. In 2371, while visiting Deep Space 9, he made an appointment to play darts against the highly praised Chief Miles O'Brien with Quark. He didn't know however that the Ferengi hadn't told Chief O'Brien about it. Syvar offered Chief O'Brien the opportunity to withdraw without a loss of honor, but Chief O'Brien welcomed the challenge.
During the game, however, O'Brien injured his shoulder (right before what likely would have been the winning shot) and required immediate surgery. Syvar pointed out that by leaving, O'Brien would forfeit the game, but O'Brien left anyway. (DS9: "Shakaar")