Getty The Pittsburgh Post-Gazette's Gerry Dulac provided a very positive update on injured Pittsburgh Steelers first-round pick Derrick Harmon. First-round rookie Derrick Harmon is going to miss some regular season time for the Pittsburgh Steelers . That quickly became a foregone conclusion when Harmon left Week 3 of the preseason with a knee injury. But despite needing a cart to leave the field, the injury wasn’t severe enough to potentially rule out Harmon for the season. It also might not be