James Cook has officially moved from breakout candidate to fantasy football cornerstone. After handling a true workhorse role for the Buffalo Bills in 2025, Cook enters 2026 as one of the safest and highest-upside running backs on the board. James Cook, Buffalo Bills The Bills gave Cook a workhorse opportunity last season (342 touches – 265 in 2024 and 281 in 2023). He responded by upping his yards per rush (5.2 – career high), highlighted by gaining 20 yards or more on 13 plays, with five reaching the 40-yard mark. Cook ended the year ranked sixth in fantasy points (305.20) in PPR formats, while coming into the season as about the 14th running back drafted. Over his previous two years, he finished 11th (235.50 – 2023) and 8th (266.70 – 2024) in fantasy scoring. Cook began last year with four consecutive games with touchdowns (5), with the latter three resulting in over 100 yards rushing (21/132/2, 19/108/1, and 22/117/1).…