Conklin, especially, may interest teams as insurance in goal. He's earning $1.4 million this season (with a $1.3 million cap hit) and will be an unrestricted free agent July 1.
The weekend waiver period concludes at noon ET Monday. Also put on waivers Saturday were Bret Carson (Carolina); Jason Jaffray (Anaheim); DJ King (Washington); Nathan Lawson and Rob Schremp (New York Islanders); and Tim Stapleton (Atlanta).
The most surprising move was the Washington Capitals claiming Sturm off waivers from the Los Angeles Kings. Acquired by the Kings from Boston in mid-December, Sturm is earning $3.5 million this season and will be an unrestricted free agent July 1.
Rivet, 36, was hoping for a new start. He wasn't cracking Buffalo's lineup most nights. The surging Columbus Blue Jackets claimed him on re-entry waivers, which means they split the remainder of his contract with the Sabres. He's earning $3.5 million this season and will be a UFA July 1.
"Craig Rivet brings steady play, experience and leadership to our team, which will be very important as we head down the stretch this season," general manager Scott Howson said in a statement.
Rivet is expected to join the club in time for Sunday's game at Nashville.
The Philadelphia Flyers, who recently lost defenseman Oskars Bartulis (shoulder) for 10 to 12 weeks, picked up defensive depth in the veteran Boynton, who is earning the league minimum $500,000 this season and will be a UFA July 1.
"I couldn't be happier," Boynton said in a statement released by the team. "I was a little shocked and didn't realize that I was put on waivers until late last night, but I couldn't ask to be coming to a better team or organization. I've been around the league for a while and I hope to bring that experience, try to work hard and play solid defense and chip in with whatever the team needs."
Pierre LeBrun covers the NHL for ESPN.com.