The Redskins have signed offensive linemen Calvin Armstrong and Kevin Sampson to the practice squad, the team announced on Tuesday.
To make room for Armstrong and Sampson, the team released offensive lineman Kili Lefotu and fullback Brian Bell from the practice squad.
Both Armstrong and Sampson worked out for team officials on Tuesday morning. They are expected to be available for practice on Wednesday as the team prepares for this Sunday's game against Arizona.
Armstrong, 6-7 and 320 pounds, is in his second NFL season out of Washington State and was with the Redskins this past offseason. He was released in the team's final roster cuts on Sept. 1.
Armstrong was a sixth-round draft choice by Philadelphia in 2005. He was active for three games during his rookie season, but did not see action.
Sampson, 6-4 and 312 pounds, was a seventh-round draft choice out of Syracuse by Kansas City in 2004. Limited by injuries in three seasons with the Chiefs, he has seen action in 16 games with seven starts at right tackle in his career.
He was released by Kansas City prior to the start of the regular season and spent two weeks on the Carolina Panthers' practice squad earlier this year.