Hoping to put a troublesome off-season behind them, the Falcons began their 2007 campaign on the road against the Minnesota Vikings. In the first quarter, Atlanta immediately trailed as Vikings DT Kevin Williams returned an interception 54 yards for a touchdown, which was the only score of the half. In the third quarter, Minnesota increased its lead with kicker Ryan Longwell getting a 49-yard field goal. In the fourth quarter, the Falcons got their only score of the game, with kicker Matt Prater's 45-yard field goal. From there, the Vikings put the game away with QB Tarvaris Jackson completing a 60-yard TD pass to RB Adrian Peterson, along with CB Antoine Winfield returning an interception 14&#160;yards for a touchdown. QB Joey Harrington, in his Falcons debut, completed 23 out of 32 passes for 199 yards with no touchdowns and 2 interceptions.. How many yards per completion did Joey Harrington average in this game?