​Just when we all thought we were over this. 

The career of Sam Bradford has been nothing short of confusing. After being the No. 1 overall pick in 2010, he fizzled out in St. Louis because of injuries. He then proceeded to have a great season for the Eagles, who quickly drafted Carson Wentz and traded him to the Vikings. 

Now he's in Minnesota, ​and by all accounts, he's thriving. But there's a blip on the radar, and it's concerning. 

Bradford was apparently limited in practice with a knee injury today. Why should that concern Vikings fans? He tore the ACL in his left knee twice back in 2013 and 2014, which was basically the Kiss of Death for his time with the Rams. 

While it's far too early to panic, the Vikings have seen far too much go wrong for their franchise for them not to be a little worried. Protecting Bradford should be a priority for this team, and the Steelers are coming off a seven-sack performance against a better offensive line. 

Here's hoping the injury isn't a big deal.