When Brewers fans should expect Cooper Pratt in MLB after unprecedented extension

For the second time in three years, the Milwaukee Brewers have handed a contract extension to a prospect with no MLB service time. In 2023, it was Jackson Chourio who received eight years, $82 million (up to $142.5 million), setting a record for the most amount of guaranteed money given to a player who had yet to make their MLB debut.

Fast forward two and a half years, during which Chourio has made the front office look like geniuses, and Matt Arnold and company are reportedly signing another prospect, who is not yet in the major leagues, to a long-term contract. As first reported by MLB insider Bob Nightengale of USA Today, shortstop prospect Cooper Pratt has reportedly signed an eight-year, $50.75 million contract (up to $81 million) with the Brewers. Jon Heyman of the New York Post was first to confirm the exact dollar amount.

This deal currently ranks as the third-largest guaranteed contract ever given to a player who has yet to make his MLB debut, though that could change depending on when Pittsburgh Pirates' top prospect Konnor Griffin finalizes the $140 million contract he's reportedly agreed to. It narrowly surpasses Luis Robert’s six-year, $50 million agreement with the Chicago White Sox in 2020, but was quickly pushed down the list after the Seattle Mariners set a new record by signing Colt Emerson to an eight-year, $95 million deal shortly after Pratt's deal was reported.

Interestingly, both Pratt and Emerson signed their deals after appearing in only a handful of Triple-A games, and each was part of the 2023 MLB Draft. Pratt was a sixth-round pick and labeled as 'the steal of the draft', while Emerson was a first-rounder. Of the two, however, Pratt’s extension is more surprising. While his defensive ability is widely regarded as elite, his offensive numbers don’t suggest the same level of polish at the plate, especially in terms of power and run production.

With that context in mind, the natural question becomes when Pratt might actually make his big league debut?

Cooper Pratt's extension doesn't guarantee a major-league debut during the 2026 season

Given Pratt’s limited experience at the upper levels of the minors, along with Joey Ortiz currently holding down the shortstop job in the big leagues, the organization is unlikely to rush the No. 4-ranked prospect's promotion to MLB. While it's fair to assume that the Brewers don't want to be paying Pratt "major league dollars" to play in the minor leagues for too long, his development is the number one priority, and it's likely the contract is back-loaded to some extent, which would alleviate short-term financial pressure.

That said, should Pratt answer the questions that remain about his offensive skills through the first few months of the Triple-A season, his advanced defensive ability means a late-2026 debut is still very much in the cards. If Ortiz struggles at the plate as he did last season, the risk of turning to Pratt diminishes because at that point any offensive production he provides would simply be an added bonus on top of his already polished defense.

Time will ultimately determine whether that scenario unfolds, but it’s entirely possible that Pratt won’t make his debut until 2027 even with his new contract. There are several unknowns heading into next offseason, most notably a potential new labor agreement through the collective bargaining process, which could impact how the Brewers construct their roster. As a result, Milwaukee’s moves next winter could create an opening for Pratt by the start of the following season.

For predictions' sake, I'll say Brewers fans see Pratt in the majors during the final months of the 2026 season, but the safe bet is Opening Day 2027.