The Arms Race - Inside the Battle for the Rotation

The Arms Race
Inside the Battle for the Cardinals’ Rotation

Every spring, radar guns light up and optimism runs high. But rotation jobs aren’t won by velocity readings in February. They’re earned through command, durability, and trust.

The Cardinals enter this season with more candidates than chairs. Five starters will take the ball every turn — possibly six — and the competition isn’t about promise anymore. It’s about performance.

The Individual Battles

Matthew Liberatore -The conversation around Liberatore has shifted. It’s no longer about projection; it’s about production. The left-hander has shown stretches where he looks like a steady mid-rotation arm, commanding the fastball and finishing hitters with his breaking ball. Projection systems such as ZiPS and PECOTA view him as serviceable — an ERA hovering in the low 4.00s with average strikeout totals. That’s useful. But the Cardinals need him to pitch with conviction, not caution. His battle is consistency. When he throws strike one, he controls the inning. When he falls behind, the margin narrows quickly.

Michael McGreevy - McGreevy’s profile is built on composure and control. He doesn’t overpower hitters, and the projection models don’t forecast dominance. They see durability and contact management — a starter capable of keeping a team in games if the defense supports him. Last season showed both the promise and the limits of that approach. The key this spring is simple: he's added a slider to his mix and the question is can he miss just enough bats to avoid constant traffic? If he can, he becomes a stabilizer. If not, he walks a tightrope every outing.

Andre Pallante - Pallante’s sinker gives him a foundation. When it’s right, it produces ground balls in bunches. As a reliever, that’s been an asset. As a starter, the challenge is navigating lineups the third time through. The projections are modest — useful innings, average run prevention. His path into the rotation depends on efficiency and limiting free passes. He doesn’t need to reinvent himself. He needs to sustain effectiveness deeper into games.

Dustin May - May changes the equation — if he’s healthy. His projections carry more swing-and-miss upside than the rest of the group, but they’re cautious with innings for a reason. When available, he profiles as one of the top arms in the mix. The question is availability. The Cardinals don’t just need flashes of dominance; they need dependable turns every fifth day. If he gives them volume, he likely secures a front-line role within this group.

Richard Fitts - The quiet competitor in the room. Projection systems don’t paint him as an ace, but they do see strike-throwing ability and poise. In a crowded field, that matters. He’s not competing for headlines — he’s competing for trust. And sometimes in March, trust carries more weight than pedigree.

The 5-Man vs. 6-Man Rotation Question

Hovering over the competition is a practical decision: five starters or six?

A traditional five-man rotation demands clear separation. The fifth starter must earn the job outright. But a six-man alignment changes the threshold. It becomes less about dominance and more about durability and strike-throwing.

For a staff with health questions and younger arms whose innings may need managing, a six-man rotation offers protection. It spreads workload, preserves arms early, and may pay dividends late. It also opens the door for that fifth or sixth starter who proves steady rather than spectacular.

But there’s a cost. A six-man rotation shortens the bullpen and limits flexibility. If one arm struggles, the margin tightens quickly. This isn’t a philosophical decision. It’s a structural one.

The Cardinals must decide whether to rely on five to carry the weight — or trust that protection in April builds strength in September.

 This is the arms race in St. Louis. Not a race for radar readings. Not a contest of prospect rankings. A competition measured in strike one percentages, efficiency, and resilience. The projection systems offer their estimates. Last year’s numbers provide caution. But spring will reveal something more important: which arms can be trusted when the games count.

Championship rotations don’t always overpower. They out-execute.