As the MLB season heats up, fantasy managers need to keep a close eye on emerging players and strategic matchups. Nick Kurtz, the Athletics' top prospect, is set to debut this week after an impressive Triple-A stint, boasting a .367 batting average and seven home runs in just 14 games. His performance could make him a valuable asset for fantasy teams looking for a spark.

Meanwhile, Sal Frelick of the Milwaukee Brewers has been a breakout star, batting .378 and displaying speed with five stolen bases this April. His under-rostered status at just 34% in Yahoo leagues makes him a prime target for fantasy owners. Lastly, Craig Yoho, another Milwaukee prospect, brings a strong changeup and an impressive minor league ERA, making him a potential addition for managers in need of bullpen help.

In a remarkable display of speed and strategy, the Milwaukee Brewers set a franchise record for stolen bases in a single game during a 14-1 rout of the Oakland Athletics. The team stole nine bases, breaking the previous record held since 1992. Logan Henderson, making his MLB debut, showcased his pitching prowess with five strikeouts and an impressive fastball-changeup mix. The offensive onslaught began with six steals in the first inning, leading to a commanding 4-0 lead.

Sal Frelick led the charge, tying the game record with his second steal before Caleb Durbin's successful second base steal solidified the new record. It appeared that Athletics starter Jeffrey Springs struggled to control the running game, prompting a balk that allowed another run to score. The Brewers' aggressive base running was a key factor in their victory, igniting excitement among fans and setting a benchmark for the season.

This week's Waiver Wire Watch highlights key players under 40% rostered in ESPN formats for fantasy baseball. Jonathan Aranda (TB) continues to impress with a .367 average and significant power in recent games, while Tyler Fitzgerald (SF) showcases speed and a hot streak, hitting .353 over his last ten games. Dylan Moore (SEA) benefits from increased playing time due to injuries on his team, hitting .308 and displaying speed potential. Other notable players include Rhys Hoskins (MIL), who is gaining momentum post-injury, and Chandler Simpson (TB), whose speed makes him an enticing add. Sal Frelick (MIL) and Jorge Polanco (SEA) also show promise, solidifying their everyday roles. For deeper leagues, players like Mike Yastrzemski (SF) and Gabriel Arias (CLE) are notable mentions, offering reliable contributions and multi-position eligibility.

As the 2025 MLB season heats up, Week 4's fantasy baseball waiver wire offers several intriguing outfielders worth considering for your roster. Tyler Fitzgerald of the San Francisco Giants has been on fire, showcasing a .444 batting average with two home runs and six RBIs in his last seven games. His dual eligibility at OF, 2B, or SS makes him a valuable pick-up for those looking to capitalize on his hot streak.

Similarly, Sal Frelick from the Milwaukee Brewers is excelling with a .319 batting average and five steals, making him a solid volume play. Meanwhile, Houston Astros rookie Cam Smith is building on his momentum, having recently notched his first multi-homer game. For deeper leagues, Austin Hays and Heston Kjerstad are generating buzz with power potential, while Mike Yastrzemski offers a temporary boost due to favorable matchups.