Day Three of free agency saw the Dolphins still trying to add more jewels to their treasure chest, but Tampa Bay defensive end Michael Bennett got away. Bennett, one of the best pass rushers on the market, visited the team's facility on Thursday night but later signed a one-year, $5 million contract with Seattle. He would have been yet another major coup for the deep-pocketed Dolphins, who have already signed the NFL's top free agent, former Pittsburgh wide receiver Mike Wallace. But Miami, which still has needs at cornerback, pass rusher, tight end, and possibly right tackle, has other things working. Eric Winston, Dustin Keller, Lance Louis and Thomas Howard also visited the Dolphins Thursday. Winston a former Kansas City Chiefs right tackle is a the five-year veteran who played at the University of Miami. He would fill an expected opening on the offensive line. Keller, a tight end last year with the New York Jets remains a possibility. Keller, limited to eight games last season due to injuries, would be a pass-catching upgrade over former tight end Anthony Fasano, who signed with Kansas City. Louis is recovering from a knee injury (torn anterior cruciate ligament) that ended his season with Chicago in late November. Howard is a seven-year veteran linebacker who missed last season with Cincinnati due to a torn ACL he sustained September.