He also receives a $4-million signing bonus, per Heyman.
The 32-year-old joined the Dodgers last winter after being non-tendered by the Oakland Athletics following an injury-plagued 2019 campaign. While he didn't quite recapture his All-Star form of 2018, Treinen was a reliable bullpen arm for L.A., posting a 3.86 ERA, 3.15 FIP, and 1.21 WHIP with 22 strikeouts in 27 appearances.
In the playoffs, he struck out 10 batters over 11 1/3 innings to help the Dodgers win the World Series.
Treinen owns a career 3.02 ERA and 1.28 WHIP with 413 strikeouts and 72 saves over seven big-league seasons. His best year came with the A's in 2018, when he finished sixth in AL Cy Young voting after posting a sparkling 0.78 ERA with 100 strikeouts.
Treinen will continue to provide depth behind Kenley Jansen as part of a powerful late-inning unit that also includes Brusdar Graterol and Joe Kelly. He could also spell Jansen in the closer's role if needed, given his past experience as an All-Star in Oakland. There's also potential for his role to expand in 2022 after the contracts of both Jansen and Kelly expire.
The Dodgers have spent this offseason fortifying their bullpen. In addition to Treinen, they traded for former All-Star closer Corey Knebel and also signed right-hander Tommy Kahnle - who will likely miss all of 2021 due to elbow surgery - to a two-year deal.