The move signals that no team was interested in trading for League during the 10-day period following his designation for assignment earlier this month.
The 32-year-old had not pitched for the Dodgers this season due a right shoulder injury that has limited his work since February.
In a 10-game rehab assignment with Class A Rancho Cucamonga and Triple A Oklahoma City, League struck out eight batters and allowed one earned run.
In 2014, League had a 2–3 record and a 2.57 ERA over 63 appearances with the Dodgers.
The Dodgers explored trading League during December’s winter meetings, Fox Sports’ Ken Rosenthal reported. At the time, they were willing to take on roughly half of League's $7.5 million salary for 2015. League was in the third and final year of a three-year, $22.5 million contract.
Had League played in at least 55 games this season, his fourth-year player option would have vested.