LeSean McCoy

In his latest mock draft, Pat Kirwan of CBSSports projects the Philadelphia Eagles trading star running back LeSean McCoy plus two first-round picks to the Oakland Raiders for the No. 4 overall pick and the chance to select Oregon QB Marcus Mariota.

(Julio Cortez)

Harrisburg native LeSean McCoy is entering his NFL prime. The Philadelphia Eagles' 26-year-old feature back, a Bishop McDevitt graduate, is the franchise's all-time leading rusher (6,792 yards). He is also coming off a 2014 season in which he ran for 1,319 yards and McCoy holds 11 major Eagles rushing records.

But Pat Kirwan of CBSSports.com can see Philadelphia shipping McCoy plus the Eagles' 2015 first-round pick (No. 20 overall) and a 2016 first-round pick to Oakland for the Raiders' 2015 first-round pick (No. 4 overall), a move that could net Chip Kelly's team Oregon quarterback Marcus Mariota.

McCoy and two No. 1s for Oakland's No. 1 ... would it happen?

Kelly, the former Oregon head coach, is obviously familiar with Mariota's versatile skill set and Mariota is one of just two standouts -- the other being Florida State's Jameis Winston -- in a 2015 quarterback class that is considered weak.

In Kirwan's latest mock draft released Tuesday, he sees Winston going No. 1 to Tampa Bay, USC defensive lineman Leonard Williams landing with the Tennessee Titans at No. 2 and Jacksonville selecting Nebraska pass-rusher Randy Gregory third.

Then at No. 4, Kirwan writes: "The Eagles come up for Marcus Mariota and send their first-round pick this year and next year plus RB LeSean McCoy to the Raiders.

"McCoy has three years left on his contract and the Raiders have plenty of cap space to absorb the contract.

Oregon quarterback Marcus Mariota is headed to the Philadelphia Eagles in Pat Kirwan's latest mock draft. To get Mariota, the Eagles would trade star running back LeSean McCoy plus two No. 1 picks to get a player Chip Kelly knows from his days as Oregon head coach. (AP Photo/Eric Gay)

"If the Eagles have to throw in another player or later round pick to close the deal they should do it. Maybe they recoup some of the compensation by trading Nick Foles. Cleveland and the Jets should be interested in Foles.''

Should Kelly and the Eagles make the big deal with Oakland to acquire Mariota, it would make sense to trade Foles, their starting quarterback heading into the 2014 season.

But who would be the Eagles' feature back if McCoy is shipped to the West Coast?

Behind McCoy on Philadelphia's current depth chart are 31-year-old Darren Sproles and 25-year-old Chris Polk, who carried 46 times for 172 yards and four touchdowns last season.

Sproles, an NFL vet who spent his first year with Philadelphia in 2014, is a change-of-pace back who made an impact as a runner (329 yards, six touchdowns), receiver (40 catches, 387 yards) and punt returner (13.0 average, two touchdowns).