7 MLB Players Who Must Step Up in 2026 | Replacing Key Departures & Filling the Void (2026)

Every team faces the inevitable challenge of losing star players, and the real test lies in how they rebuild and adapt. But here's where it gets controversial: is it better to look outside for replacements or trust the talent already on the roster? This question becomes even more pressing as we examine seven players who now find themselves in the spotlight, tasked with filling the void left by departed stars. And this is the part most people miss—these players aren’t just stepping into big shoes; they’re being asked to redefine their roles and prove their worth in ways they never have before.

Marcelo Mayer, 3B, Red Sox
The Red Sox’s infield dynamics shifted dramatically when Alex Bregman chose the Cubs over a return to Boston. While acquiring Willson Contreras addressed one infield need, the focus now turns to Mayer. Here’s the bold take: Contreras might replace Bregman’s bat, but Mayer’s performance will determine whether Boston’s infield has truly improved or merely shuffled its weaknesses. At just 23, Mayer is expected to take the reins at third base, a move that could either solidify or expose the team’s infield strategy. What do you think—is Mayer ready for this leap, or is Boston risking too much on unproven talent?

Jacob Misiorowski, SP, Brewers
The Brewers’ decision to trade ace Freddy Peralta to the Mets has left a gaping hole in their rotation, and Misiorowski is the man pegged to fill it. But here’s the catch: his rookie season was inconsistent, and now he’s expected to be a frontline starter alongside injury-prone veteran Brandon Woodruff. Misiorowski’s electric stuff is undeniable, but can he deliver under pressure? If not, the Brewers’ rotation could be in for a rough season. Do you believe Misiorowski can rise to the occasion, or is this too much too soon?

Andrew Painter, SP, Phillies
Once the top pitching prospect in baseball, Painter’s journey to the Majors has been anything but smooth. Tommy John surgery and a rocky return to the mound have delayed his debut, but with Ranger Suárez’s departure, the Phillies can no longer afford to wait. And this is the part most people miss: Painter isn’t just a prospect anymore—he’s a necessity. Now ranked as MLB Pipeline’s No. 28 overall prospect, Painter must prove he’s worth the hype. But here’s the question: after years of setbacks, can he still live up to his potential? Or has the window for him to become a star already closed?

These players are at a crossroads, and their performances will shape their teams’ futures. What’s your take? Are these players ready to step up, or are their teams setting them—and themselves—up for failure? Let us know in the comments!

7 MLB Players Who Must Step Up in 2026 | Replacing Key Departures & Filling the Void (2026)
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