Even though the Minnesota Vikings have rolled to a 5-0 record, they will use their bye week to possibly add an offensive lineman, and former Pro Bowl tackle Jake Long is among the candidates, according to sources.

Vikings right tackle Andre Smith was inactive Sunday with what had been listed as an elbow injury, but sources say there is concern about a related biceps injury. Smith has denied an NFL Network report that his injury is serious enough for him to be a candidate for injured reserve. The team already has lost left tackle Matt Kalil to hip surgery.

The Vikings will work out other linemen, but Long is the most prominent and has some support on the staff if he can prove he is physically stable, sources say.

Offensive tackle Jake Long was with the Falcons last season, but he appeared in just four games and played 11 snaps. Kyle Terada/USA TODAY Sports

Long was the No. 1 pick in the 2008 NFL draft by the Miami Dolphins when current Vikings offensive line coach Tony Sparano was the Dolphins' head coach. The four-time Pro Bowl lineman underwent ACL surgeries in his right knee in both 2013 and 2014 while with the then-St. Louis Rams. He played just 11 snaps for the Atlanta Falcons in 2015.

Long, 31, told ESPN in June he was "finally healthy ... the best I've felt in five or six years." His pronouncement was endorsed to teams by Dr. James Andrews, who has performed Long's surgeries and overseen the player's recovery. The Ravens were on the verge of signing him in July, but the deal fell apart when Long declined to sign a waiver on his right knee.

Sources say Long is willing to play for around the veteran minimum wage of $885,000, which would be prorated with 11 games remaining in the regular season. The Vikings have only an estimated $1.8 million of salary-cap space available.

The Vikings had no comment on Long or the specificity of Smith's injury and status.

NFL Insider Ed Werder contributed to this report.