While the initial transition from Cam Cameron to Jim Caldwell as Baltimore Ravens offensive coordinator wasn't perfectly seamless, the results the switch have produced in the few short weeks he's taken over the offense make a very strong case for him keeping the job permanently in 2013.
Though the Ravens have two losses in the time since the switch—Week 15 against the Denver Broncos, that was just days after Caldwell took over the offense and came as a result of a number of factors completely out of Caldwell's control, and Week 17 against the Cincinnati Bengals, after the Ravens had a postseason berth locked down and they chose to mostly rest their starters—the improvements we've seen cannot be attributed to anything other than Caldwell having greater control.
Caldwell joined the Ravens staff in the 2012 offseason as quarterbacks coach after spending the previous 10 years as quarterbacks coach, assistant head coach and then head coach of the Indianapolis Colts, working closely with future Hall of Famer Peyton Manning.
The hope was that Caldwell could get more out of Ravens quarterback Joe Flacco, who despite helping lead his team to the postseason every year he's been there, had been both inconsistent on a game-by-game basis as well as seemingly on a plateau in terms of his progress. His rookie season notwithstanding, in the three seasons from 2009 through 2011, he had nearly the same passing yardage totals (3,613, 3,622, 3,610), touchdowns (21, 25, 20) and interceptions (12, 10, 12).