In 2012, the 49ers' draft class made a minimal contribution.After one exhibition game, it's already apparent that the Class of '13 likely will play a much bigger role.Safety Eric Reid, in particular, showed in his professional debut that he could be an impact player.Reid didn't start Thursday night's 10-6 loss to the Denver Broncos at Candlestick Park – veteran Craig Dahl played the opening minutes – but Reid got the majority of playing time and showed the hitting prowess he exhibited as a collegiate star at LSU.The 49ers' first-round draft choice made six tackles in the game, including a pair of big-time hits. His first was on Broncos tight end Virgil Green after Green had made a reception. Later, Reid knocked wideout Kemonte' Bateman completely off his feet."We're football players, so it was exciting to hit somebody else – and to really hit somebody else," Reid told Andrew Pentis of 49ers.com after the game. "That's my favorite part. … I like contact. Coach (Vic Fangio) was saying that he is looking for a physical safety. That's something that I think I can bring to the scene."The hit on Green was especially memorable. Reid raced forward from his free...