running back Jamaal Charles to help during Leonard Fournette‘s absence.The 31-year-old Charles worked out for the team Tuesday morning and signed a one-year contract in the afternoon.The Jaguars (3-2) lost third-string running back Corey Grant (foot) for the season and expect to be without Fournette for several more weeks. Grant was placed on injured reserve Myles Jack Color Rush Jersey , opening a roster spot for Charles.Charles should be able to pick up the offense quickly and make an immediate contribution Sunday at Dallas (2-3) while playing behind T.J. Yeldon.Charles spent nine years in Kansas City and played 14 games with Denver last season. He has 7,556 yards rushing and 44 touchdowns, plus 2,586 yards receiving and 20 more scores.The Jaguars also signed rookie running back Dave Williams off Denver’s practice squad and released first-year back Brandon Wilds, who was a non-factor with the ball and a liability as a blocker.The team also placed Austin Seferian-Jenkins on injured reserve and promoted fellow tight end David Grinnage from the practice squad to the active roster.The Jags also signed rookie tight end Pharoah McKever to the practice squad.___ EAGAN, Minn. — After the coaching staffs for Jacksonville and Minnesota met the night before, a group of 12 trusted players from both the Jaguars and Vikings convened before the two teams took the field for their first joint practice.More Vikings coverageVikings coordinators: Defending Brees, Holton Hill’s role, a Minneapolis Miracle story and moreWATCH: The second annual Minnesota Sports AwardsVikings welcome Everson Griffen back to practiceVikings captain Griffen returns to team activitiesVikings Snap Counts: Rookie Hill shines with Rhodes ailingThe goal of the gatherings could be boiled down to this: No fighting.Please.“We really don’t want to end up being on TV like some of these other things,” Vikings coach Mike Zimmer said. “We just want to get out there and get some work done and try to get each of us better.”There’s no reason for the Jaguars and Vikings, who only play each other in the regular season every fourth year, to bring any grudges to these dual individual drills and simulated game situations.Jaguars coach Doug Marrone spent three years as an assistant coach with the New Orleans Saints, when Zimmer’s son and current Vikings linebackers coach Adam Zimmer was also on staff. Jaguars assistant offensive line coach Tony Sparano Jr . is the son of the late Vikings offensive line coach, who died suddenly of heart disease right before training camp .“I think they’re an excellent football team. They’re well-disciplined. They’re well-coached,” Marrone said Abry Jones Jersey , speaking of the Vikings. “Those are the type of teams you want to come and practice against.”This was Marrone’s idea, proposed to Zimmer shortly after the exhibition game schedule was finalized in April with the Jaguars playing the Vikings on Saturday.Zimmer acknowledged some hesitation, citing his preference to follow training camp routine, but he agreed to include his team in an exercise that has long been common around the league. The workouts at Minnesota’s gleaming new facility will feature two teams that reached the conference championship games in January.“I figured, `OK, they’re a good team. Let’s go and do it,'” Zimmer said.The purpose is to break up the monotony of two-a-days and providing extra opportunities for evaluation of bottom-of-the-roster candidates. The Vikings joined the Bengals for practices two years ago in Cincinnati where Zimmer used to be the defensive coordinator, a trip that conveniently allowed him to stay at his ranch retreat in rural Kentucky.“After going against the same defense, the same schemes, the same players every day, at some point it gets a little old,” Vikings wide receiver Adam Thielen said.The excitement and, thus, the intensity have ramped up for these sessions on Wednesday and Thursday. That’s why the pre-practice conversations took place about keeping the competition healthy and respectful.“I’ve done it almost every year I’ve been a head coach in this league so I’ve seen great results from that if it’s done properly,” Marrone said.The New York Jets and Washington Redskins had a multiplayer melee on Sunday spill into the crowd of fans . The Jaguars had their own scuffle to sort out https://www.jaguarsfanstore.com/Yannick-Ngakoue-Jersey , with a scrap between defensive ends Dante Fowler and Yannick Ngakoue that prompted Marrone to keep Fowler and star cornerback Jalen Ramsey home from this trip . Zimmer banished wide receiver Stefon Diggs and cornerback Xavier Rhodes from practice one day last week after their trash-talking antics angered him.The Vikings had some testy joint practices with the Kansas City Chiefs in 2003 and again in 2004, when pro wrestler Brock Lesnar made his ill-fated tryout with the Vikings as a defensive lineman and stirred up his share of shouting and shoving in scrimmages.So even the best of intentions can be cast aside in the heat of the moment when it’s, literally, as hot outside as it’ll be all season.Diggs and Thielen, for their part, were disappointed by Ramsey’s absence and the lost opportunity to test their skills against an All-Pro. The Vikings still faced plenty of challenges against the Jacksonville defense, which ranked second behind the Vikings last season in fewest yards and points allowed.“We came here to work. We came here to get things done,” Diggs said. “So as far as anything extra, we’re not interested.”The first session on Wednesday came and went without any drama, as both sides intended.“This is a good team to go against, a good team to get us right and to see where we are,” Jaguars linebacker Telvin Smith said afterward. “Hopefully we push each other in the right way and we’ll be seeing each other in the right game later on.”