Free-agent wide receiver Mario Manningahm reportedly signed a one-year deal with the Giants today and the 49ers are presumably aren’t stressed about losing his services.

After tearing two knee ligaments in December 2012, Manningham, 27, never fully recovered last year. He missed the season’s first eight games and was ineffective once he returned: Colin Kaepernick had a 13.9 passer rating when targeting him, completing 9 of 23 passes for 82 yards with two interceptions.

Just before Manningham was placed on injured reserve before the regular-season finale, Jim Harbaugh’s assessment of his health sounded a bit ominous.

“We’ll do what’s in the best interest of his career,” Harbaugh said. “He’s got input on that. It’s really a conversation between doctors and Mario at this point.”

Even before Manningham returned to the Giants, who drafted him in 2008, it seemed all but certain he wasn’t returning to the 49ers. And he’s not alone as quarterback Colt McCoy and center Jonathan Goodwin have also likely played their last snap with the team.

Here’s a look at the 49ers’ remaining unrestricted free agents:

CB Perrish Cox, 27: The 49ers have a glaring need for a slot cornerback and the Cox capably filled that role in playoff wins over Green Bay and Carolina when Carlos Rogers was sidelined. Cox, who was released three times in 2013 (twice by the Seahawks), doesn’t figure to be a long-term answer, but he could provide insurance if, say, a highly drafted rookie struggles.

Cox, who was released by the 49ers on Nov. 12, was re-signed less than a week before the wild-card win at Green Bay. However, he still leapfrogged Eric Wright on the depth chart because, in defensive coordinator Vic Fangio’s estimation, he was better prepared.

General manager Trent Baalke, whose history with Wright dates to a meeting at his UNLV pro day in 2007, has long been a fan of the former second-round pick. But the coaches went with Cox in a high-stakes game. If Cox is re-signed – the 49ers didn’t tender him as a restricted free agent – he could battle Wright for a roster spot.

C Jonathan Goodwin, 35: Goodwin, who hasn’t missed a start since 2008, can still play, but it won’t be with the 49ers. The team reduced his salary before the 2013 season, never approached him about returning in 2014 and signed waiting-in-the-wings center Daniel Kilgore to a contract extension earlier this month.

Goodwin, who hasn’t ruled out retirement, will play another season if he can find a good fit. He’d presumably like to play close to his home in Irmo, S.C., where he lives with his wife and three young sons.

QB Colt McCoy, 27: Last week’s trade for Blaine Gabbert basically ensured McCoy will sign elsewhere. After a bumpy start with the Niners, McCoy said he learned more about the quarterback position in his one season with the team than he had at any point in his football career. A former starter with the Browns, he’ll look to use that knowledge at his next stop.

WR Kassim Osgood, 33: A three-time Pro Bowler whose last trip to Hawaii was in 2009, Osgood showed he could still get it done last year in his debut season with the 49ers. According to statistics compiled by the coaching staff, he ranked fourth on the team in special-teams tackles (12), fifth in points (634) and first in “big plays” (16), one of which was a blocked punt in a home win against the Seahawks.

The 49ers lost a core special-teams contributor last week when running back Anthony Dixon signed with the Bills. It wouldn’t be surprising if they re-signed Osgood.