Updated: UFA snapshot into Friday evening

St. Louis Rams receiver Brandon Gibson became the 13th unrestricted free agent from the NFC West to reach a contract agreement since the signing period opened Tuesday.

The Miami Dolphins announced what was thought to be a three-year agreement with Gibson, who did not figure into the Rams' plans after catching 51 passes for 691 yards and a team-leading five touchdowns last season.

The chart below lists all UFAs from NFC West teams, noting which ones reached contract agreements.

In other developments around the division:

  • Tackle update: Dolphins free-agent tackle Jake Long left Rams headquarters without a contract agreement. That leads me to think Long will most likely sign elsewhere. The Rams have other options, including the draft (they have two first-round selections, after all). Long would upgrade the line, no question, but price deserves special consideration given injury concerns. To what degree Long wants to leave Miami is another potential factor.

  • Safety market: Rams free agent safety Craig Dahl is reportedly visiting the San Francisco 49ers. The Detroit Lions re-signed safety Louis Delmas, who had visited both the Rams and 49ers. The safety market remains flooded even after former Cardinals mainstay Adrian Wilson reportedly reached an agreement with New England. Teams can afford to take their time.

  • Aldon's shoulder: Ian Rapoport of NFL Network reported that 49ers outside linebacker Aldon Smith underwent shoulder surgery this offseason. That is counter to what Smith told Cam Inman of the San Jose Mercury News last month. The 49ers do not disclose information regarding surgeries. Either way, Smith was known to have played through shoulder trouble last season. He'll presumably be healthy for 2013.

  • Obomanu let go: Longtime (since 2006) Seattle receiver Ben Obomanu's Twitter account indicated the Seahawks planned to release him. The move had seemed likely even before the team acquired Percy Harvin. Obomanu was scheduled to earn $2.3 million in salary from a team that no longer needed him as much on offense or special teams. Obomanu went from playing roughly half the offensive snaps over the 2010 and 2011 seasons to playing 29.2 percent of them last season, according to ESPN Stats & Information.

  • Dumervil available: The Denver Broncos' failed attempt to renegotiate Elvis Dumervil's contract ended with the team releasing Dumervil and an explanatory statement. Dumervil's 63.5 sacks tied for seventh-most in the NFL since his 2006 rookie season even though Dumervil missed the 2010 season due to injury. There are no indications NFC West teams have serious interest in Dumervil, but his name is another to keep in mind, at least.

2013 NFC West UFA Watch for March 15, 8:30 p.m. ET