Post-Trade Deadline Fantasy Baseball Waiver Wire Sleepers to Watch

As the MLB trade deadline creeps closer, fantasy baseball managers are buzzing. Roster shakeups could unleash hidden gems on the waiver wire, and there’s real opportunity here if you’re paying attention.

Whether you’re chasing premium arms, desperate for stolen bases, or just want a few multi-category contributors, this is your window. Undervalued assets are about to get bigger roles—don’t blink or you’ll miss them.

Let’s run through some players who deserve a hard look as the post-deadline landscape gets weird.

Pitchers to Target: Cecconi, Jax, and Lee

Pitching is still the backbone of fantasy baseball, and the upcoming trade deadline could scramble bullpens and rotations in a hurry. If you’re sharp, you can snag an arm or two that’ll make a difference down the stretch.

Slade Cecconi: The Diamondbacks’ Rising Starter

Slade Cecconi has quietly turned into a reliable option since June. He’s put up a 3.33 ERA, 1.17 WHIP, and a 43:15 K:BB ratio over 54 innings.

If you need a short-term pickup, he’s a solid bet, especially with a two-start week on deck. Cecconi limits hits and keeps walks in check, so he’s a steady contributor for both points and category leagues.

Griffin Jax: A Dark Horse on the Trade Radar

Griffin Jax’s 4.09 ERA probably doesn’t thrill you, but that 68:12 K:BB ratio? That’s elite for a reliever.

If the Twins move Jhoan Duran at the deadline, Jax could slide into a high-leverage role with real fantasy upside. Even if nothing changes, his underlying stats make him a smart stash if you’re chasing strikeouts or holds.

Dylan Lee: Closing Opportunity Awaits

Dylan Lee could find himself closing for the Braves if Raisel Iglesias gets traded. He’s already rocking a 2.62 ERA and a 0.94 WHIP, so the skills are there.

If Lee gets even a share of the ninth inning—or splits it with Pierce Johnson—he’ll suddenly be one of the hottest bullpen pickups out there.

Position Players to Watch: Keaschall, Simpson, and Collins

Trades can create logjams or open up playing time, and that means some hitters are about to see their fantasy value spike. Here’s who’s standing out right now.

Brooks Lee and Willi Castro Dynamics

Brooks Lee might get a shot with the Twins if Willi Castro is moved. He’s a stash with an appealing mix of power and speed.

His versatility makes him an easy fit in both roto and points formats, and he’s worth a look if you’ve got the bench room.

Lionel Simpson: A Speed Demon

Lionel Simpson might just lead the majors in steals after the break. If you’re desperate for speed, he’s your guy.

He hits leadoff, barely strikes out, and chips in across categories—especially runs in points leagues.

Collins’ Quiet Breakout

Collins has quietly become a full-time player for the Brewers. Since June, he’s hitting .299 with five homers, four steals, and a .873 OPS.

He’s helping in batting average and speed, so if you need a dependable hitter, grab him off waivers before the rest of your league catches up.

Daily League Advantage: Moniak and Baldwin

If you play daily leagues and like to chase matchups or ballpark factors, a couple of names are worth circling as the deadline approaches.

Mickey Moniak Thriving in a Career Year

Mickey Moniak is having a career year with an .865 OPS. He crushes righties and loves hitter-friendly parks like Coors Field.

The Rockies have a home-heavy stretch coming up, so Moniak’s a strong streaming option for daily leaguers. Don’t wait too long—these windows close fast.

Baldwin’s Path to Breakout Production

Baldwin has locked down a full-time role for the Braves and could see even more at-bats if Marcell Ozuna gets dealt. He’s a rare catcher/DH hybrid with power and batting average upside.

If you need help at catcher—a brutal spot in fantasy—Baldwin’s worth stashing or streaming, depending on your league setup. His arrow’s pointing up.

Final Thoughts: Timing Is Everything

The MLB trade deadline shakes up real-life rosters and cracks open all sorts of fantasy possibilities. As that window creeps closer, it’s smart waiver wire moves that can really set contenders apart in your league.

Maybe it’s a pitcher about to step into a bigger role. Or a speedster who suddenly matters. Sometimes it’s hitters quietly racking up numbers while no one’s watching.

Which roles will expand? Who’s actually going to get the ball and do something with it? That’s the puzzle that can make or break your team’s second half.

 
Here is the source article for this story: Fantasy Baseball Waiver Wire: Key players who could see better roles after the MLB Trade Deadline