Waiver Wire Watch returns with four standout under-40% rostered MLB adds. Colson Montgomery sits at 39% rostered, carrying a big upside despite a recent dip in contact; his 119 Process+ since mid-July signals a hitter with power and a chance for a steady role. Sal Frelick is a daily job in Milwaukee, piloting a 18-steal pace and a .294 clip in his last 15 games, making him a dependable multi-category asset. Jordan Beck has surged for Colorado, hitting .326 with four homers and 13 RBI across 26 games, and the Coors Field factor only heightens his upside. Lenyn Sosa is entrenched in an everyday role with a 113 Process+ since July 15, delivering a .293/.343/.511 line with four homers in 25 games. These names offer a mix of safety and upside for mixed leagues seeking cheap wins down the stretch.

Colorado rode a clean, professional night at Coors Field to a 4-3 win over Arizona, snapping a rough patch with a composed team performance. Tanner Gordon found a groove five days after a rough stretch, handing off a lead to a bullpen that slammed the door. Offensively, Hunter Goodman opened the scoring with a 25th homer, and the Rockies drilled timely contact and smart baserunning to back that up. Tyler Freeman kickstarted a decisive fifth inning with a triple, and Beck delivered a two-out bloop double that plated the winning run. The defense was steady, the order balanced, and the bullpen evergreen as Colorado kept faint playoff hopes alive.

Goodman tweaked his swing and bat choice, keeping him on the backside and driving the ball with authority. Brenton Doyle supplied a wall-arriving double after a Beck misplay, while Karros snagged at third and Fernandez grounded in a run, giving the Rockies a varied, productive attack up and down the lineup. Ritter’s heads-up baserunning created Colorado’s second run, a reminder that aggression on the bases can turn close games into wins. Gordon’s line—three runs on five hits in five-plus—was enough with the bullpen's late-night shutdown, as Jimmy Herget, J. Mejía, and Vodnik closed it out with a combined wallop of strikeouts.

Tarik Skubal lands as the slate’s top pitcher, delivering elite strikeouts and a sub-3.0 ERA over multiple seasons, with a solid floor in a game against Minnesota where OBP and run production have cratered since the deadline. His track record and matchup give him near-ownership certainty on a short card.

Jesus Luzardo and Edward Cabrera provide solid midrange upside. Luzardo’s season thrives outside two rough starts against Blue Jays and Brewers, and he’s fanned plenty while facing Washington’s weaker lineup. Cabrera has logged a 2.22 ERA since May 1, offering a strong pairing in the midrange.

The Arizona Diamondbacks spin a Coors Field stack anchored by Corbin Carroll, Ketel Marte, Geraldo Perdomo and Adrian Del Castillo, a quartet poised to plate runs in the game’s hitter-friendly venue. On the Coors side, Colorado’s Beck, Doyle, Goodman and Tovar offer cheap exposure while Colorado’s park inflates run scoring. Kerry Carpenter and a Mets stack with Soto, Alonso, Lindor and Nimmo round out the core, with Elder’s recent struggles opening opportunity for righty-heavy lineups.

Bottom-line: this slate rewards high ceilings at the top with savvy value plays the rest of the way. Target the Coors tilt for stacking leverage, balance with Miami and Detroit arms, and don’t sleep on the Mets’ power quartet against Elder. Build multiple rosters to capture the upside across these correlated matchups.

Kyle Karros reached the majors with Colorado after a deadline shakeup that jettisoned veteran third baseman Ryan McMahon. The fifth-round pick out of UCLA spoke of comfort and a return to basics after his call-up, delivering an RBI single in his first big-league game and a walk that highlighted his plate discipline. The Rockies’ season pivot also spotlighted a bevy of top-tier prospects in the system, including Zac Veen, Jordan Beck, and Warming Bernabel, who have been tearing through the farm and are primed for future big-league impact. The Isotopes and Yard Goats updates showed Rockies depth at every level, with pitchers like Xzavion Curry and the organization’s staff leaning on veteran guidance to accelerate development. Fantasy managers should monitor how the roster reshaping influences Karros’ at-bats and how the arrival of multiple prospects could shift playing time and opportunities in the Rockies’ lineup going forward.

For fantasy baseball managers navigating Week 19 of the 2025 season, several under-the-radar hitters are poised to bolster statistical categories. Blake Perkins, recently elevated to starting center fielder for the Milwaukee Brewers, is generating buzz after scoring eight runs and hitting two homers in his last week. Trent Grisham of the New York Yankees is set for increased playing time due to Aaron Judge's injury, recently hitting his 20th home run. Meanwhile, Lenyn Sosa from the Chicago White Sox is showcasing versatility and power, scoring six runs in the last week.

In terms of home run potential, Warming Bernabel and Jordan Beck of the Colorado Rockies are both on fire, with Bernabel hitting .417 and three home runs in his first ten days. Ryan Mountcastle of the Baltimore Orioles, returning from the IL, is another speculative yet intriguing add. For those seeking stolen bases, Luke Keaschall and Wenceel Perez present solid options, both demonstrating speed and opportunity. Finally, Spencer Horwitz from the Pittsburgh Pirates is quietly leading off, while Isaac Collins has quickly become a Rookie of the Year candidate.