Free agent fullback Zach Line has been cleared to do everything following hip surgery, a source tells Ian Rapoport of NFL.com (on Twitter). The green light means that he can participate in full-contact drills in camp. 
Line visited the Jets in March but he left without a deal. Now that he’s fully healthy, it’s possible that Gang Green could circle back to him. The Jets don’t have a true fullback on the roster and they have at least some interest in a blocking specialist to lead the way for Matt Forte, Bilal Powell, and the rest of the gang.
Line graded out as the league’s 12th best fullback last year, according to Pro Football Focus, though only 17 fullbacks played enough to qualify for their rankings. Line had roughly even grades for run blocking and pass blocking in his 211 snaps.
To date, Line has spent his entire playing career with the Vikings. Over those four years, he has been used primarily for blocking with just 13 carries and seven receptions to his credit.
Really liked Line coming out of SMU and was suprised he went undrafted in 2013. Hopefully he can catch on with someone.