Today is the first of three Pittsburgh Steelers’ preseason games, the best chance for players to solidify their roster spot. Of course, it’s a chance to also lose ground in a roster race. To a lesser degree, training camp also provides those ebbs and flows, risers and fallers throughout the process. The risers are generally well-documented. Names like RB Jaylen Warren, CB James Pierre, ILB Mark Robinson, OLB Delontae Scott. The fallers have been discussed less but throughout the first 12 public practices, I’ve found five Steelers on the roster last year whose odds of making it again are slipping.