Matthew Liberatore Leads Cardinals Vs Padres Upset Bid at Petco Park
The cardinals vs padres opener on Thursday night puts Matthew Liberatore opposite Michael King, and St. Louis is being backed to win outright as an underdog. The game starts a four-game series in San Diego on May 7, 2026, with carrying the matchup at 10 p.m. ET.
Liberatore and King
Liberatore has been part of five Cardinals wins in his seven starts, and the club enters the opener having taken seven of its last nine games. That run gives St. Louis a sharper form line than the price might suggest.
King brings the cleaner traditional ERA at 2.95, but the supporting metrics tell a less comfortable story. His 5.21 botERA and career-low 93 Stuff+ sit well below the 101 Stuff+ he posted a year ago.
Petco Park Numbers
Petco Park adds another layer to the matchup. Its 97 Park Factor is the second-lowest mark in baseball, which trims some of the usual offensive edge in a high-total setting.
The lineup splits lean toward the Cardinals against right-handed pitching, where they own a 109 wRC+. San Diego’s offense has lagged against left-handed pitching at an 88 wRC+, while the Padres are listed with a.661 offensive result against lefties.
Cardinals Bullpen Edge
St. Louis also brings a rested bullpen after Tuesday’s rainout, and all of its top relief arms are available. Riley O’Brien, who has a 1.43 FIP, has thrown only three pitches in the last four days.
That leaves the Cardinals with a late-inning path that the matchup does not fully price in. San Diego’s bullpen is led by Mason Miller, whose staff owns a 3.18 SIERA that ranks second in MLB, but the betting call still leans to St. Louis to spring the upset behind Liberatore.
JD wrote, “Our MLB expert is backing St. Louis to spring the upset behind the arm of the underrated Matthew Liberatore.” He also said, “My Cardinals vs. Padres predictions and MLB picks for Thursday, May 7 are taking a shot on the underdog Redbirds to win outright.”
