The 33-year-old running back had his first practice with the Redskins on Tuesday Dwayne Haskins Redskins Jersey , a day after signing a one-year deal with Washington.“I can give a lot. I really believe that,” Peterson said following his first practice. “I feel like the sky is the limit.”Injuries and opportunity limited Peterson to 13 games over the past two seasons. He averaged 3.4 yards per carry in 10 games last season with the Saints and Cardinals.Peterson remained on the sideline throughout the offseason waiting for the next opportunity, a scenario he admitted was “rough.”His workouts continued. Peterson was in his native Oklahoma when his agent said the Redskins wanted a look. The three-time NFL rushing champion was ready.“I know what I have left in the tank,” Peterson said.Despite his career achievements, Peterson didn’t big-time the workout opportunity. He volunteered to join other free-agent options in various drills.“He’s actually a physical freak,” Redskins coach Jay Gruden said. “Some of the backs we had in here were huffing and puffing, keeling over. He was standing straight up. He could have gone for another two hours.”The Redskins decided they couldn’t go forward with their limited options at running back for the final two preseason games and possibly their Week 1 opener at Arizona on Sept. 9.Washington, 28th in yards rushing last season, addressed the concern by selecting running back Derrius Guice in the second round of the draft. The LSU product’s rookie year ended with a season-ending knee injury in the first preseason game against New England.The Redskins lost Samaje Perine and Byron Marshall for an extended period of time as both suffered ankle injuries in Thursday’s preseason win over the New York Jets.After waiving undrafted free agent Martez Carter with an injury designation, the Redskins had only three healthy running backs available. One of them, Chris Thompson, has yet to play in the preseason following last season’s broken fibula.Robert Kelley, a 2016 undrafted free agent who emerged as Washington’s No. 1 running back during his rookie year and started 2017 on top of the depth chart, remains in the starting mix. Kapri Bibbs offers some depth. Adding Peterson and De’Veon Smith provides more.What happens going forward remains unsettled.“We haven’t really gotten into detail, but obviously they brought me in here for a reason. I’m just going to play my role, whatever it is,” said Peterson, whose is three years removed from rushing for 1,485 yards with the Vikings. He finished with 529 yards last season.Last season’s numbers provided data for doubters who believe Peterson’s difference-making days are done.“It shows me people don’t really know about football,” Peterson said of the naysayers. “When people say, (3.4) yards per carry, there’s a lot that contributes to that as well. I just brush it off and continue to work.”That work began Tuesday with the Redskins.“It’s his first practice. He did a great job today,” said Gruden, who stated he hoped to get Peterson some work in Friday’s preseason game against Denver.“You’ve got a Redskins jersey on. You’re here to compete and make the squad. It’s no different with (Adrian). We’ll just see how he does day after day.” Washington running back Adrian Peterson has proven he can still be productive, and has continued to set high goals for himself.But as he gets closer to the end of a strong career Terry McLaurin Jersey , he’s thinking about the end, and who he wants to end it with.According to Ben Goessling of the , the former Vikings MVP said he wants to return to his original team when it’s time to retire.“This is where I started; this is where it’s going to come to an end, as well,” Peterson said. “People ask me all the time, and they keep throwing me off, like, ‘Where would I retire? A Saint, a Cardinal or a Redskin?’ It’s like, ‘No, I’m going to retire a Viking.’ I was here a decade — some great memories, some everlasting friends. I’m just forever indebted to the state of Minnesota. I’ll definitely be retiring a Viking, for sure.”Peterson ran for 11,747 yards in 10 seasons in Minnesota, and has 1,571 yards in the three years since he left, so it seemed like an easy call. But he said any hard feelings that might have existed after his release have dissipated.“I believe I gave my heart to the state of Minnesota and my fans, anytime I stepped on the field,” he said. “It’s not like I left on bad terms, like we fell out. Things just didn’t work; they went their way, I went my way. It was just kind of mutually beneficial, for me and for them.”Gaining 1,042 yards at age 33 last season suggests it might be a few years before he’s ready to cash in on that goodwill, however.