Montgomery is, in some ways, the left-handed version of Nola. He's entering his age-31 season. He barely issues walks. He's a known commodity with a promising ceiling and high floor. His career ERA (3.80) is almost exactly the same as his career FIP (3.79). Any team is getting a good pitcher if they sign Montgomery.
He's only really hit his stride the last three seasons, too, which actually might help his case in free agency. Monty's on track to make at least 30 starts for a third consecutive year. In 2020, he was making his way back from Tommy John surgery and had a tough time during the COVID-shortened season, but bounced back admirably.
He's now pitched for three contenders since 2021. He went to the playoffs with the Yankees in 2021, the Cardinals in 2022, and could do the same with the Rangers in 2023. He has experience in big markets where the stakes are as high as can be. He won't be too expensive, but he won't be a bargain.
It depends how far the Dodgers want to go in this market of 1b pitchers. Montgomery is good, but probably not LA's style for an AAV of $20 million or higher. But even if they were to take the plunge, Montgomery has gotten better with each year he's pitched and will stabilize the middle of a playoff-bound team's rotation.