The Giants made a surprising addition on Friday by adding former Eagles Pro Bowl guard Shawn Andrews. Andrews, who made two Pro Bowls and thrived at guard for the Eagles, lost his job there after playing only two games over the past two years. Last season, the problem was a back injury, while a battle with depression cost Andrews the entire 2008 season. The Eagles said he failed a physical when they cut him in March. If he gets in shape and stays healthy, Andrews can still be an above-average guard who can help address injury issues the Giants are facing with Chris Snee and Rich Seubert. And you’d assume that Andrews would be motivated to play the Eagles twice this season. (This Tweet indicates he is.) Maybe this is a gamble that doesn’t pay off, but it makes sense for the Giants to take a low-cost shot on a player who thrived before.