Los Angeles made the announcement on social media:
Forsythe was a late bloomer, serving as a part-time utility player for the first four years of his career before a breakout 2015, when he hit .281/.359/.444 in a career-high 153 games.
The 29-year-old continued to play well in 2016, hitting .264/.333/.444 in 127 games, but was sidelined for one month with a fractured scapula suffered in May.
The Dodgers acquired Forsythe from the Tampa Bay Rays because they desperately needed to upgrade second base.
Chase Utley did return as a part-time player this season and will fill in for the time being, though he's best served as a platoon option after posting a suboptimal .470 OPS against left-handed pitching in 2016, per Baseball Reference.
Enrique Hernandez and Chris Taylor could also draw some starts in the short term.
Los Angeles does have depth in the lineup with Corey Seager, Justin Turner and Adrian Gonzalez forming a solid heart of the order.
Losing Forsythe, who was batting leadoff, for any period of time will put more pressure on players like Yasmani Grandal, Joc Pederson and Yasiel Puig to step up their production so the Dodgers remain atop the National League West again in 2017.