NASHVILLE, Tenn. (AP) — Arturs Silovs is making his NHL playoff debut Sunday in Game 4 for Vancouver as the third different Canucks goalie to start their best-of-seven, first-round series against Nashville. Silovs was in net during warm-ups with Nikita Tolopilo the only other Canucks' goalie on the ice. Tolopilo, who went undrafted out of Belarus, has never appeared in an NHL game. The Canucks started All-Star Thatcher Demko in a Game 1 win, then coach Rick Tocchet announced Demko is week-to-wee