Last year, as the Vikings' starter, Jackson went 2-4, with 26-14 loss to the Eagles in the playoff.
In te offseason, Houston's Rosenfels was traded to the Vikings, becoming a competitor with Jackson for the job of starting quarterback.
Till now, competition between the two is even up, according to the Minneapolis Star Tribune. Jackson told the Star Tribune that he will work arder in the competition. And of course so will Rosenfels.
As a result, we can expect the competition to be continued, except that Brett Favre would be signed by the Vikings.