MANKATO, Minn. -- The Minnesota Vikings were in their final practice before an off-day. Their Monday afternoon practice was delayed 20 minutes by a thunderstorm that cropped up just after the session had started.
The conditions seemed right for the chippiest practice of training camp so far, and Monday's workout was exactly that.
The 90-minute practice was punctuated by the first two skirmishes of camp -- a brief shoving match between running back Matt Asiata and linebacker Emmanuel Lamur, and a feistier exchange between Jabari Price and Laquon Treadwell, in which the cornerback and first-round pick went to the ground and Treadwell emerged without his helmet. Coach Mike Zimmer, though, didn't sound worried about the brief dustups.
"It's not a big deal," he said. "Sometimes it's good. [If] you come out here and everybody's happy all the time -- it's a physical game, and we've got to be physical. They won't do it in the game; I'll fix it by then. But it's not bad."
Here are several other notes and observations from Monday's practice:
Running back Jerick McKinnon, who has been getting extra work with Adrian Peterson nursing a slight hamstring strain, left early in Monday's practice, joined by a member of the team's athletic training staff. "He's fine. He'll be alright," Zimmer said. "He just got twisted."
The Vikings have been rotating Joe Berger and John Sullivan in the first-team offense, and it was Berger's turn to work with the No. 1s on Monday. During one-on-one pass-rush drills, Berger did a solid job against Linval Joseph, holding his ground against the big nose tackle and widening his rush angle toward the quarterback. Zimmer said the Vikings want to start setting a depth chart hierarchy after Tuesday's off-day, so it will be interesting to see how they handle things at both center and right tackle, where Andre Smith and T.J. Clemmings have been trading time with the first unit.
Defensive end Everson Griffen has been getting some chances to show his flexibility early in camp, and Monday saw Griffen dropping into coverage in the vicinity of Charles Johnson, running step-for-step with the receiver and engaging in some good-natured banter on the way back to the huddle.
Peterson, who participated in the Vikings' walk-through on Monday morning, didn't practice on Monday afternoon, and Cordarrelle Patterson continued to sit out after injuring his shoulder last Friday.
Up next: The Vikings will have one of two scheduled days off in Mankato on Tuesday, while team officials return to the Twin Cities for the ceremonial groundbreaking of the Vikings' new practice facility in Eagan, Minnesota. NFL commissioner Roger Goodell is scheduled to be in attendance.