The day after possibly finding a long-term solution at cornerback, the Washington Redskins selected two turnover-forcing safeties Saturday on the final day of the NFL draft, potentially shoring up one of the most uncertain positions on the roster. Washington used a fourth-round pick to select Fresno State’s Phillip Thomas and then in the sixth round, the team selected Georgia’s Bacarri Rambo. With their three remaining draft picks, the Redskins improved their depth, selecting speedy running back Chris Thompson and pass rusher Brandon Jenkins — both fifth-rounders out of Florida State — and then added Rutgers running back Jawan Jamison in the seventh round. With a total of seven players added in six rounds, Coach Mike Shanahan declared Washington’s draft a success. “When you get done with the draft, you’re trying to look for some depth and some competition on your football team and I thought we were able to do that today,” he said. “I felt good about the guys that we did get. It gives guys a chance to compete against one another, and we’re a better football team today than we were yesterday, and I thought the draft went well.” The Redskins appear to have gotten bargain deals in Thomas and Rambo. Shanahan called his team fortunate to have landed both safeties, which he and his staff rated highly, but didn’t know if they’d both be available. The 6-foot-1, 208-pound Thomas — a unanimous first-team all-American selection by the American Football Coaches Association, the Associated Press and Football Writers Association — was expected to be drafted either late in the second round or somewhere in the third round. But both rounds came and went on Friday, and Thomas remained available. Then on Saturday afternoon, at the 119th selection of the draft (22nd of the fourth round), Thomas’s phone rang, and on the other end was the team he grew up cheering for.