FLOWERY BRANCH — Talk about a costly victory for the Atlanta Falcons. Linebacker Sean Weatherspoon became the third starter placed on injured reserve Tuesday after a win over the St. Louis Rams, though he will be eligible to rejoin the roster in Week 11. The Falcons (1-1) used the one-time-only designation that allows an injured player to return, but Weatherspoon won't be able to practice for six weeks and can't play in a game for eight weeks.