Nootbaar's Comeback Homer Masks a Fragile Cardinals Closer Situation

Lars Nootbaar was not supposed to play Friday. The Cardinals had mapped out a graduated return from offseason double heel surgery, and the script called for limited at-bats against a Reds lineup that St. Louis figured to handle even without its injured outfielder fully engaged. Instead, Nootbaar launched a 433-foot home run in the bottom of the eighth inning to break a 5-4 deadlock and send Busch Stadium into delirium. The Cardinals won 6-5, and the narrative became a feel-good story about resilience and perfect timing.

But the win exposed a critical vulnerability. Closer Riley O'Brien entered with the lead and two outs in the ninth. He promptly surrendered consecutive hits, walked Spencer Steer to load the bases, and forced an ABS challenge sequence before escaping on a grounder. That is not the closing profile of a team with margin for error. O'Brien was supposed to lock down games. A single appearance where he allows multiple baserunners with the save situation live is a data point; a pattern of this play is an organizational liability.

Nootbaar's return from heel surgery is the positive here—a player of his caliber back in the lineup early in his recovery window is a win for the team's depth. But the Cardinals' reliance on a dramatics-dependent finish against a Reds team they should dominate reveals how thin their relief infrastructure actually is. If O'Brien continues to labor in save situations, St. Louis's ability to run up late-inning leverage will deteriorate quickly.

For bettors, the prop angle lives in the spread, not the individual performance lines. The Cardinals are priced as a solid favorite against Cincinnati, and Friday's win will reinforce that market positioning. However, if O'Brien's ninth-inning shakiness becomes a recurring trait, their close-game equity degrades. Any Reds-Cardinals matchup over the next two weeks where St. Louis is favored by 1 to 1.5 runs carries elevated risk on the moneyline. The market hasn't yet baked in the closer instability; it will. Wait for the line to tighten after another O'Brien appearance or two, then fade Cardinals ML in tight games until his mechanics settle.