Raiders hire Greg Olson as offensive coordinator

That all changed when Hue Jackson was hired as offensive coordinator in 2010 and implemented a power system better suited to McFadden's skills. In two seasons with Jackson calling plays, McFadden averaged 5.3 yards per carry and broke one of every 15 runs for at least 20 yards.

Last season, he averaged 3.3 yards per carry — the lowest ever for a Raiders back with at least 150 carries in a season — and the Raiders stumbled to a 4-12 record. He also had only four runs of at least 20 yards in 216 carries.

"I'm not an offensive guru, but I do know when Darren is running certain plays, it's pretty doggone good, and he had some last year," general manager Reggie McKenzie said Thursday. "But when you talk about a scheme, he's not a lateral mover. He's not one of those guys. As soon as he can go north and south, that's when he's at his best."

April has spent 21 seasons as a special teams assistant in the NFL, including a very successful six-year run in Buffalo. April spent the past three seasons with the Eagles and has also worked with St. Louis, New Orleans, Pittsburgh and Atlanta.

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