KANSAS CITY -- On Monday, the Royals signed left-hander Mike Montgomery, who was eligible for arbitration, to a one-year deal for 2020 worth $3.1 million.

The Royals also non-tendered infielders Cheslor Cuthbert, Humberto Arteaga and Erick Mejia, as well as right-hander Jesse Hahn. Cuthbert and Hahn were arbitration-eligible. None of those non-tenders came as a surprise.

Montgomery, who was acquired from the Cubs for catcher Martín Maldonado at the 2019 Trade Deadline, made $2.44 million in 2019. In 13 starts with the Royals, Montgomery went 2-7 with a 4.64 ERA. He is expected to be a part of the Kansas City's rotation in 2020.

The Royals’ 40-man roster now sits at 36, which will allow them to participate in next week’s Rule 5 Draft, as well as perhaps sign some cost-effective free agents. They also need a roster spot in the event outfielder Alex Gordon, now a free agent, decides to return for another season.

Hahn, acquired from the A's in 2018, underwent elbow surgery last offseason. The 30-year-old made six relief appearances for the Royals in 2019 -- his first MLB outings since '17 -- and had a 13.50 ERA.

Cuthbert hit .274 with 12 home runs in 128 games in 2016, while filling in for an injured Mike Moustakas. But Cuthbert never got on track again, as he hit nine home runs and had a .673 OPS in 87 games this past season.

Mejia was acquired from the Dodgers in 2018 in a three-team deal that also included the White Sox. He hit .227 in nine games for the Royals this past season.

Arteaga hit .197 in 41 games for the Royals in 2019.