With improved depth on defense, the Vikings came into training camp with high hopes that 2005 would be a big season. That depth took a hit on the first full day of practice over the weekend, as rookie safety Dustin Fox went down with a broken left forearm that was diagnosed Monday.
Fox, who was signed less than a week ago, is expected to miss six weeks -- which would put him in line to return on or about the regular season opener Sept. 11.
Fox was battling Willie Offord for the third safety spot behind Darren Sharper and Corey Chavous.
On a shortened day of practice, because of heat and humidity, the morning practice was cut back by 30 minutes.
The Vikings officially signed two more players Thursday, bringing to two the number of rookies…