David Robertson will be a free agent this offseason and plans to represent himself.
The right-hander will be coming off a four-year, $46 million contract.
Only six relievers in Major League history have received more guaranteed money in a deal.
Huston Street represented himself when he negotiated his final two-year, $18 million contract with the Los Angeles Angels.
Robertson, who will be 34 in April, had a 3.23 ERA with 11.8 K/9, 3.4 BB/9, 0.9 HR/9 and a 45.3 percent ground-ball rate in 69 2/3 innings.