JJ McCarthy, Marvin Harrison Jr., and Ricky Pearsall are poised to make significant impacts in the 2025 NFL fantasy landscape. McCarthy is currently undervalued at quarterback, ranked 27th, despite the Vikings' impressive offensive weapons like Justin Jefferson and an effective system under Kevin O'Connell. Harrison Jr., after a disappointing rookie season, is considered a 'post-hype sleeper' with potential for growth, while Pearsall’s breakout at the end of his rookie season positions him as an intriguing option for fantasy managers in the highly competitive landscape of wide receivers.