There is relatively little up for grabs at the Washington Redskins’ training camp perhaps a handful of roster spots and a starting job or two. One of the few positions where the typical talk about competition for playing time might be more than just talk is right tackle where incumbent starter Tyler Polumbus was re-signed as a free agent in the offseason but two NFL veterans were added as potential alternatives. Polumbus has continued to work with the starting offense in training camp practices while one newcomer Tony Pashos has practiced with the second team and the other Jeremy Trueblood has spent his time on the third-string offense. Polumbus probably remains the favorite and perhaps a strong favorite to stay put as the starter when the regular season begins. But the fact the Redskins brought in two experienced players at his position reinforces the notion that Polumbus’s hold on the starting job isn’t particularly strong. Even so Polumbus says he is spending this camp focusing on his own play and he didn’t fret too much when the Redskins added Pashos and Trueblood. “They weren’t really my concern” Polumbus said this week. “My concern is always myself and just trying to be the best player I can be. Obviously when I went through free agency and went down to Jacksonville and they made me an offer I talked to Coach [Mike] Shanahan and a lot of guys here and they made me feel comfortable with why they want me here.” Polumbus declined to specify what the Redskins said to convince him to re-sign. But asked what made him comfortable that returning to Washington was best for his career Polumbus said: “I just knew that Coach Shanahan has always been good to me going back to my Denver days. I feel like his system gives me the best chance to be the player I know how to be.” Polumbus took over as the Redskins’ starter at right tackle last season with Jammal Brown unable to play because of an ailing hip. He widely was viewed as the weakest link on an offensive line that was not thought to be among the team’s strengths entering the season. But the starting unit remained intact basically all season — Polumbus missed one start after suffering a concussion while the other four members of the line started all 16 games — and performed well as the Redskins had one of the league’s most productive offenses.