The Cincinnati Bengals and linebacker Keith Rivers agreed to a contract, ending a nine-day holdout by the ninth overall pick in the draft.  According to ESPN.com, the deal is for six years with a voidable year for the player that could shrink the contract to five years.  Rivers is expected to join the Bengals for practice on Wednesday. The team had projected him as a starter for the regular season, but dropped him on the depth chart due to missing so much time.  The 6-foot-2, 241-pound Rivers helped lead Southern California to a 47-5 record over four seasons. He totaled 240 tackles in his career with the Trojans.  Jacksonville defensive end Derrick Harvey, taken eighth overall, is the final first-round holdout.