St. Louis brings a legitimate form angle into Petco Park, but the matchup is less comfortable than the records suggest. The Cardinals have been one of the hotter teams in the league over the past couple of weeks, yet Wednesday's 6-2 loss to Milwaukee showed how quickly their profile can flatten when the lineup is chasing and the bullpen has to protect a deficit instead of a lead. San Diego counters with a cleaner pitching setup for this specific opener, as Michael King owns the stronger run-prevention and strikeout indicators compared with Matthew Liberatore. The Padres are also coming off consecutive wins in San Francisco, including a 5-1 result Wednesday that restored some market confidence after their brief slide. The betting case comes down to whether St. Louis can pressure King early enough to avoid chasing a low-margin road game. If not, San Diego's home field, bullpen depth, and starting-pitching advantage justify favorite treatment.