Seattle Seahawks running back Kenneth Walker had a superb rookie season, but what are the expectations heading into his second year? Seattle Seahawks rookie running back Kenneth Walker had a promising rookie campaign that saw him rise to prominence as the juice that made the offense go. With Geno Smith playing some of the best football of his career and receivers Tyler Lockett and D.K. Metcalf both surpassing 1,000 receiving yards, Walker did his bit, rushing for 1,050 yards and nine touchdowns in his 15 games. He caught 27 passes for 165 receiving yards as well. Those stats make for…