MANKATO  — Offensive line repair was the top offseason priority for the Minnesota Vikings.

That was a given, after a grueling experience with injuries and ineffectiveness in 2016. The Vikings used 12 players among the five spots and eight unique starting combinations in 16 games, a major reason why their 5-0 start skidded into an 8-8 finish.

The sight, then, of new left tackle Riley Reiff leaving the first full-team practice of training camp on a cart prompted plenty of cringes around the field.

“We don’t want to start the same thing that happened last year. We want to try to get through 16 games with these guys, but it’s concerning,” Zimmer said. “You don’t want to get anybody hurt the first day.”

Without any official injury reports required during the preseason, the Vikings have not explained how or what Reiff hurt. But he was a spectator, not a participant, for a fourth consecutive day on Monday.

Rashod Hill, who was signed off Jacksonville’s practice squad late last season, has been taking Reiff’s place with the first-team offense.

“I know he’s bummed, but he’ll be out there soon I’m sure,” right tackle Mike Remmers said.

Left guard Alex Boone sounded a little more on edge, even in playful sarcasm during an exchange the other day with a reporter who asked if Reiff’s absence triggered any “oh, no, not again” feelings from the team.

“We’re not doing it again. You know what? No more. We’re all healthy. We’re good,” Boone said. “We’re good, right? We’re good dude. Just say we’re good. I can’t do this again.”