The person didn't want to be identified because the deal is contingent on Proctor passing a physical Monday.
Several South Florida media outlets were also reporting the deal on Friday.
Proctor underwent surgery in October to repair a partially torn flexor tendon and is expected to be healthy for spring training. He missed two months of the 2008 season and was left off the Dodgers' postseason roster.
The Marlins needed bullpen help after the departures this offseason of right-handers Kevin Gregg to the Chicago Cubs, Doug Waechter to Kansas City and Joe Nelson to Tampa Bay.
Battling elbow trouble, Proctor went 2-0 with a 6.05 ERA in 38 2/3 innings last year. He has a career ERA of 4.42 in 262 games.
Proctor turned 32 Friday. He was born in Stuart, Fla., and pitched for Florida State.
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