Sportsbooks are facing their second straight Stanley Cup sweat.

Last year, as the expansion Vegas Golden Knights reached the Stanley Cup Final, Nevada bookmakers found themselves rooting against the hometown squad to avoid a multi-seven-figure loss. This year, they're sweating the upstart St. Louis Blues, who have authored one of the greatest in-season turnarounds in recent memory, going from 300-1 long-shots in January to Stanley Cup finalists in May.