The Vikings have acquired veteran QB Kelly Holcomb from the Philadelphia Eagles for a 6th round pick in the 2009 NFL Draft.  This was a good move by the Vikings as Holcomb has been a decent backup QB in his NFL career.  Holcomb is efficient in the short passing game but he doesn’t have enough arm strength to make the deep throws.  Holcomb didn’t play a down last season for the Bills.  Holcomb has played in 34 games (21 starts) and he’s completed 523 of 810 passes (64.6%) for 5,401 yards with 37 TD passes and 37 interceptions (79.9 QB Rating).  He also has carried the football 43 times for 30 yards (0.7 ypc) with 1 TD run.  Holcomb completed 7 of 9 passes (77.8%) for 75 yards (101.4 QB Rating) for the Eagles this pre-season.  Holcomb’s arrival will likely cause a ripple effect on the QB Depth Chart for the Vikings.  The first move the Vikings make was that they cut Drew Henson.  Henson was only 4 of 9 (44.4%) for 44 yards (54.4 QB Rating) in the pre-season for the Vikings.  Either Brooks Bollinger or rookie Tyler Thigpen is likely to go next as the Vikings will likely only keep 3 QBs on their roster.  Bollinger might be in the most danger because he has been awful during the pre-season this year for the Vikings.  He has completed 12 of 21 passes (57.1%) for 102 yards with 2 interceptions (30.4 QB Rating).  Rookie Tyler Thigpen has completed 3 of 7 (42.9%) passes this pre-season for 29 yards (55.1 QB Rating).