As the Minnesota Vikings continue to search for upgrades on their offensive line, they are leaving their options open when it comes to the configuration of starters.

At this point, about the only thing likely set is that recently signed guard Josh Kline will start on the right side. That is what Kline said was indicated to him during his free-agent visit with the team last week.

“They relayed [right guard] to me, and of course you have to earn everything you get in this league,” Kline said. “I wouldn’t say I’m the starter right away, but you’ve got to act like you are. You’ve got to work your tail off in this league no matter what. They’re always trying to replace you, so you’ve always got to keep on working hard, no matter what anyone says.”

The team likely has their three other offensive line starters already on the roster, but the configuration of them is yet to be determined, which head coach Mike Zimmer acknowledged to reporters on Tuesday at the NFL Owners Meetings in Arizona.

Second-year pro Brian O'Neill, who started the final 11 games of his rookie season at right tackle, will remain at tackle. Whether that’s the on right side or left side remains to be seen. Like most of their offensive line, it depends on what happens in the draft in late April and how their selection(s) on the offensive line perform.

“I asked Zimmer about the possibility of moving Brian O'Neill to left tackle & Riley Reiff to guard, both of which he acknowledged are scenarios the Vikings are considering to give them flexibility with what they do in the draft,” ESPN’s Courtney Cronin tweeted after Zimmer’s breakfast with reporters in Arizona. “Nothing in stone yet, but flexibility is important.”

It is a scenario the Star Tribune reported last month. But Reiff might also be moved inside even if O’Neill stays at right tackle. In that scenario, the Vikings would end up with a tackle early in the draft that they felt would be best-suited on the left side.

Several tackles in the draft are projected as first-round picks. Jawaan Taylor of Florida is the top tackle on the board, according to CBS Sports, but in most mock drafts he is projected to be selected well before the Vikings’ pick at No. 18. Jonah Williams of Alabama is another left tackle and some draft analysts have him as a likely selection for Minnesota at 18, including ESPN’s Mel Kiper in his updated mock draft that was released on Tuesday morning.

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Other possibilities for the Vikings in the first round include Oklahoma’s Cody Ford, Washington State’s Andre Dillard, Kansas State’s Dalton Risner and Ole Miss’ Greg Little. In some scenarios, the Vikings could consider trading down several spots and still end up with a top-five ranked offensive tackle, and they could also move one of those college tackles to guard to his NFL career.

They might also consider drafting a guard like Chris Lindstrom, which would likely keep Reiff at left tackle, or a center like Garrett Bradbury and consider moving Pat Elflein to guard.

In other words, the Vikings are keeping their options open on the offensive line until they know what they have in the draft, but moving Reiff to guard is one of the considerations that Zimmer acknowledged on Tuesday.