Minnesota Vikings quarterback Sam Bradford underwent an arthroscopic procedure Tuesday in which Dr. James Andrews "cleaned up" his left knee but found no major damage, according to team sources. Bradford was returning to Minnesota on Tuesday night and will await the team's decision on whether the club will place him on injured reserve when it activates  Teddy Bridgewater to the 53-man roster on Wednesday. Andrews removed several loose particles from Bradford's knee, cleaned up some ragged cartilage and smoothed out a bone spur, sources said. Andrews has communicated to the club that he is hopeful the procedure will ease the pain that Bradford has been experiencing but offered no assurances on the ultimate outcome, per one source. Bradford's knee joint and structure has been previously deemed stable by team orthopedic doctors, as well as Andrews, who repaired the quarterback's two prior ACL tears in 2013 and 2014. The Vikings got Bradford in a trade with the ...