The Denver Broncos began the game against the San Francisco 49ers with Peyton Manning on the field for just one series.  He finished just 2 for 4 with 13 yards. Another key player who was missing for most of the game was Wes Welker, who only hit the field for the opening driving.  It's only preseason; Welker will have his time to shine.  Despite the lack of first-string players for the majority of the game, evidently that's all the Broncos needed because the Super Bowl contender, 49ers fell flat.  The Broncos defense forced turnovers and essentially won the game for the team.