Add the San Diego Chargers to the list of teams preparing to make a run at impending free agent Ndamukong Suh.

The Chargers are a team to watch in the race to sign the best defensive player to hit the open market in years, according to NFL Network's Ian Rapoport.

San Diego is estimated to have about $25 million in available space under the salary cap. Signing Suh would likely eat up a good chunk of that.

The Oakland Raiders and Miami Dolphins are widely reported to be in the hunt for Suh, too, and there are rumors suggesting teams like the Indianapolis Colts could get involved.

And, of course, there's still the distinct possibility Suh will re-sign with the Detroit Lions before or after free agency officially opens at 4 p.m. ET on Tuesday.

San Diego is also expected to make a run at guard Mike Iupati and wide receiver Randall Cobb, according to Michael Gehlken of San Diego Union-Tribune. Iupati is widely considered to be the best guard available, and excels as a premier run-blocker.

Cobb is just 24, and is coming off the best season of his career where he caught 91 passes for 1,287 yards and 12 touchdowns.