Rays rookie Jake Mangum headlines a September Chicago swing that doubles as a speed-and-family story. The switch-hitter, who debuted with Tampa Bay after being drafted by the Mets in 2019, is at .296 with 23 steals across 99 games, and he's set for a run of games against the White Sox and Cubs that could boost stolen-base opportunities.

The trip pairs Mangum’s ascent with his father John Mangum Jr.’s Bears legacy and an alumni night at Soldier Field, giving fantasy managers a vivid lens on his potential as a speed-driven depth option.

Nationals aim to snap a six-game slide as Jake Irvin starts at Nationals Park against Tampa Bay. Brady House sits, Paul DeJong starts, and Luis García Jr. slides to the 8th against a righty. Rays reshuffle the bottom of the order with Jake Mangum, Chandler Simpson, Bob Seymour and Hunter Feduccia while Ryan Pepiot takes the mound.

This afternoon doubles as an audition for Washington’s young core with a month left in the season, while Tampa Bay looks to maintain momentum in an afternoon clash that could ripple through late-season lineups and fantasy rosters.

As the fantasy baseball season hits Week 19, managers face tough decisions regarding underperforming players. A mix of established stars and emerging talents, players like Kodai Senga and Paul Goldschmidt have stirred concern among their fantasy owners. Senga, previously a standout for the New York Mets, is struggling post-injury with a concerning ERA and control issues. Meanwhile, Goldschmidt's recent slump leaves many questioning if it's time to part ways. On the other hand, Jake Mangum and James Wood present opportunities for savvy managers to buy low as they navigate through their struggles while still holding potential upside.

Fantasy managers must evaluate whether to hold, drop, or sell low on these players as the playoffs approach. With the season reaching its critical phase, making informed moves can determine league outcomes. Senga and Wood's talent suggests patience may pay off, while Goldschmidt's decline indicates it might be time to cut losses.

Jake Mangum of the Tampa Bay Rays and Kyle Stowers of the Miami Marlins are two players worth monitoring as potential fantasy baseball assets as the 2025 season progresses. Mangum, though a rookie at 29, has shown promising stats with a .301 average, 14 steals, and the potential for 30 stolen bases. His ability to maintain a high average while contributing steals makes him a valuable pickup, especially for those needing help in those categories.

On the other hand, Kyle Stowers has garnered attention with a robust .295 average and 21 home runs, confirming he is breaking out after a slow start to his career. With improved plate discipline and increased power metrics this season, he has the potential to contribute significantly to fantasy rosters. Fantasy managers should keep an eye on both as the season unfolds.

In Week 14 of 2025, several MLB hitters have emerged as intriguing fantasy prospects, particularly from the Milwaukee Brewers and the Pittsburgh Pirates. Caleb Durbin, rostered at 15%, boasts a .375 average with 2 HR and 7 RBI over his last 15 games, demonstrating a knack for scoring runs, although red flags indicate potential regression due to a high BABIP. Teammate Joey Ortiz is also generating buzz with a .326 average over 12 games. Meanwhile, Nick Gonzales from the Pirates is showing promise with a .345 batting average, highlighting his potential as he returns from injury. Lastly, Jake Mangum, while prolific, struggles to maintain consistency in an evolving Rays lineup.