After Darren Sproles signed his contract extension last summer, he hinted that 2017 would be his final season in the NFL. He turns 34 this month, is entering his 13th NFL season, and savors the time he can spend with his wife and two daughters. During offseason training in recent months, Sproles reminded himself to enjoy these moments. It might be because it's his last time preparing for an NFL season - although Sproles remained coy when asked if he's certain. "We're going to see," Sproles said. "Right after we make the playoffs, come back and ask me." Sproles maintains a key role in the Eagles' offense. He totaled the most carries of his NFL career last season and will join LeGarrette Blount, Wendell Smallwood, and Donnell Pumphrey in a running back committee in 2017. The Eagles invested a fourth-round pick in the 5-foot-8, 176-pound Pumphrey, who has been compared to Sproles and is expected to be Sproles' eventual replacement. Sproles already has tried to help mentor Pumphrey. He skipped organized team activities last spring to spend time with his family. The Eagles asked him to attend this year so the young running backs can learn from him. He agreed, attending the first week and this week. He spent last week with his family. Sproles noted how valuable he and Blount can be to Pumphrey and Smallwood. It's rare for a team to have one running back in his 30s. The Eagles have two. But the addition of Blount will also help a running back group that relied on Sproles carrying the ball last season. Sproles finished with 94 carries for 438 yards. That topped his 2009 mark of 93 carries, and it was the second-most rushing yards he's accumulated in a season. But at 5-foot-6 and 190 pounds, he knows that the Eagles can use a big back to complement him. That's where Blount comes in.