Editor’s note: Tenth in a series previewing the Broncos’ position groups entering training camp. Today, safeties. Previous previews: quarterbacks, running backs, wide receivers, tight ends, offensive line, defensive line, outside linebacker, inside linebacker and cornerbacks. On the roster (eight): P.J. Locke, Caden Sterns, Brandon Jones, JL Skinner, Delarrin Turner-Yell, Devon Key, Omar Brown and Keidron Smith. How many on the 53?