By Shawn Childs After a productive rookie season, the Steelers running back looks to make more explosive plays. In his first season in the NFL, Najee Harris ranked third in fantasy scoring (300.7) in PPR formats. Pittsburgh had him on the field for 81.4% of their plays, leading to a massive workload (381 touches). In essence, Harris had a Le’Veon Bell opportunity in this offense with less explosiveness. Between Week 2 and Week 17, Harris had a floor of 16.8 fantasy points in 13 of his 15 starts. He was a better player at home (1,042 combined yards with five touchdowns and 44 catches) than on t…