The Washington Redskins added more personnel Wednesday, signing offensive lineman Tyler Polumbus to the 53-man roster and tight end Fendi Onobun to the practice squad. The team also re-signed rookie cornerback Brandyn Thompson to the practice squad.

Polumbus, a fourth-year veteran, can play both left and right tackle. He got his start in the NFL as an undrafted rookie with the Mike Shanahan-led Denver Broncos in 2008.

The 6-foot-8, 300-pound Polumbus appeared in 16 games as a rookie and 15 in 2009, starting eight of them. From there, Polumbus went to Seattle, playing in another zone-blocking scheme, and started seven of 15 games. He appeared in five games as a backup this season before he was cut.

“I’m just greatful for another opportunity to come to work, and I was with Coach Shanahan in Denver and I’m grateful that he gave me another opportunity,” said Polumbus, who went to Cherry Creek High School in Englewood, Colo., the same prep school as Kyle Shanahan. “I’ve just been here for only a few hours, but I expect there to be a lot of carry-over. … He likes athletic linemen that get out and move a little bit, and that’s what I like to do.”

Polumbus was teammates with Redskins tackle Sean Locklear in Seattle the last two years.

Onobun still is relatively new to football. He played basketball at the University of Arizona for four seasons. He didn’t start playing football until he was 22 years old, when he walked on at the University of Houston, where he appeared in 11 games. Onobun appeared in three games for the St. Louis Rams last season, recording two catches for 15 yards, and spent time with the Seattle Seahawks this season, but didn’t play.

“The biggest thing with me is the whole basketball transition thing, just finding somewhere I can stick, find a home and continue playing football,” the 6-foot-6, 249-pound Onobun said. “Just want to get as many reps as I can in practice and really learn this game. As far as going from St. Louis to Seattle and Seattle to here, it’s been a crazy experience, but I’m just glad to have an opportunity to continue playing this game.”