The measureables: 6-5, 230 pounds, 15th season. The numbers: Did not play in 2011; 450 of 679 completions ( 66.3 percent), percentage, 4,700 yards, 33 TDs, 17 INTs, 91.9 rating in 2010. Against the Ravens: (8-2), 224 of 349 completions (64.2 percent), 2,689 yards, 19 TDs, 8 INTs, 96.3 rating. The challenge: How Manning will bounce back from the neck fusion surgery that wiped out his 2011 campaign remains to be seen, but if he truly is healthy, opposing defenses will have their hands full. Mannings strength is not his arm or his durability, but his vision and his understanding of defenses. The only four-time NFL Most Valuable Player has a knack for reading defenses and instinctively deciphering where the vulnerabilities are. A lot is riding on Manning being able to turn a Broncos offense that averaged just 19.3 points last season into a juggernaut. The quote: Youre facing someone who knows and understands the game. He knows and understands what all 11 guys are doing, and thats rare. Peyton is an exceptional player and has been for 10-plus years. So for us, were going to have to be on our game. We cant show because he understands. He studies every single person. He knows your movement, and he understands when youre coming and when youre not. So were going to have to put pressure on him, and were going to have to move fast. Ravens strong safety Bernard Pollard who has registered two interceptions, two passes defensed and one forced fumble in five games against Manning.