The 2025 MLB season is underway, offering fantasy baseball enthusiasts a chance to evaluate players based on early performance. Caution is warranted, as the sample sizes are still small. Luis Rengifo of the Los Angeles Angels has shown promise but faces injury concerns and competition from teammate Kyren Paris, who has been impressive in his starts. Matt Wallner of the Minnesota Twins leads off against righties but struggles against left-handers and has high strikeout rates, making him a risky add. Emilio Pagán appears to be the Reds' closer but carries home run risks, while Dennis Santana, recently handed a save opportunity for the Pirates, may not hold the position long-term with David Bednar's eventual return in play. This week’s waiver wire advice will help owners navigate these uncertain waters.