Arizona Cardinals inside linebacker Daryl Washington, a second-round draft pick out of TCU in 2010, has been suspended for the first four games of next season for violating the league’s substance abuse policy.Washington led the Cardinals in 2012 with 140 tackles — 110 of them solo — and made the Pro Bowl as an alternate. He had nine sacks, 14 tackles for loss, two forced fumbles, an interception, a fumble recovery and six passes defensed. Washington’s nine sacks were the most by an NFL inside linebacker. Washington also led the team in tackles in 2011.Washington signed a six-year, $32.5 million contract last September. He is eligible to participate in all preseason practices and in preseason games.Briefly • Redskins: Two quarterbacks were added to the roster as Rex Grossman agreed to a one-year deal to return and former Dolphins second-round pick Pat White, who hasn’t played since 2009, was signed. • Falcons: Linebacker Brian Banks, the former high school standout who spent five years in prison and five years on probation after he was falsely accused of rape, signed a contract. Banks will participate in Atlanta’s off-season workouts, which begin on April 22. • Bengals: Quarterback John Skelton, who has started 17 games in three seasons, was acquired off waivers from Arizona to compete with Cincinnati’s only other free agent signee — Josh Johnson — for the job backing up Andy Dalton. • Seahawks: The team announced the signing of free agent defensive tackle Tony McDaniel and and the re-signing of restricted free agent defensive tackle Clinton McDonald. • Lions: Detroit agreed to a two-year contract with veteran defensive tackle C.J. Mosley, who was released by Jacksonville earlier this week. • Giants: Defensive tackle Mike Patterson, who was cut last month after eight years with the Eagles, signed and joins another Philadelphia defensive castoff, Cullen Jenkins, in New York. Patterson played just five games last season after having preseason surgery to repair a brain malformation.