As Week 5 of the 2025 MLB season approaches, fantasy baseball managers should consider stashing several promising pitching prospects. Bubba Chandler from the Pittsburgh Pirates continues to excel at Triple-A, showcasing a remarkable 1.33 ERA and 0.64 WHIP, making him a must-add for any fantasy roster. Brandon Sproat of the New York Mets has had a rocky outing recently but had been on a solid trajectory prior. Zebby Matthews from the Minnesota Twins is another noteworthy prospect whose strong early-season performance suggests he may soon receive a call-up. Ian Seymour of the Tampa Bay Rays is also making waves with impressive strikeout numbers, while Cade Horton of the Chicago Cubs, coming off an injury, is showing signs of reclaiming his pre-injury form.