As we roll into Week 4, the fantasy baseball waiver wire is buzzing with fresh pitching talent that could be the key to shoring up your rotation. Whether you're chasing strikeouts or looking for a stable arm, a few names have emerged as must-consider adds for savvy managers.

Leading the charge is Brandon Sproat, whose recent call-up has fantasy circles buzzing. For teams in need of a starting pitching boost, he headlines a group of arms that also includes intriguing names like Noah Schultz and Spencer Arrighetti, all offering immediate upside.

Noah Schultz made his highly anticipated major league debut this week, and while command was an issue (four walks), there were positive signs. He battled the Rays, allowing three runs over 4.1 innings but showed promising control by throwing first-pitch strikes 75% of the time. His minor league pedigree is excellent, and after a scorching start at AAA this year, his second start will be crucial in determining his waiver wire value.

Spencer Arrighetti delivered a stellar 2026 debut, showcasing why he's on the radar. After dominating AAA, he held the Rockies to one run over six innings while racking up an impressive 10 strikeouts. While his overall MLB resume has been mixed, a brilliant 14-start stretch in 2024 proves he has the stuff for fantasy relevance, even if home runs remain a concern.

Beyond the new call-ups, keep an eye on rehabbing arms nearing returns and minor league performers. While some prospects, like Trey Yesavage, have struggled recently in the minors, their underlying stuff and potential keep them on the watch list for when they find their rhythm.

Securing the right waiver wire pitcher can be the difference between a win and a loss. As you gear up for the next matchup, these arms offer the potential to elevate your fantasy squad and help you dominate the league.