The 49ers lost their exhibition opener to the Denver Broncos Thursday night, but that didn't matter.What did matter was they didn't lose a quarterback.Colt McCoy, acquired this past offseason to back up starter Colin Kaepernick, suffered an apparent shoulder injury in the second quarter of the Niners' 10-6 loss to Denver at Candlestick Park and had to leave the game. While attempting a long pass for wide receiver A.J. Jenkins in the second quarter, McCoy appeared to take a hit on his arm. The quarterback left the game and was replaced by Scott Tolzien.The extent of the injury to McCoy wasn't immediately announced, but it apparently isn't serious – a stroke of good luck for the 49ers, who sought out the veteran for insurance because of the departure of Alex Smith. McCoy remained in full uniform for the remainder of the game, standing along the sideline. Later, it was described as a "shoulder stinger."Two other 49ers also were hurt. Rookie linebacker Nick Moody had to be helped off the field after an injury, to a knee, and veteran safety Raymond Ventrone suffered a hamstring injury and left the game. Later, Moody tweeted that his knee was OK.For the 49ers, the game...