Carlos Rodon had his surgery in May of 2019. He next threw a competitive pitch in late September of 2020, and he was really terrible at the time. That 16 months isn’t a totally unreasonable schedule, it’s 12 months or more just to heal and then several months more to build back strength on average. You should be prepared for him to not be fully effective until towards the end of the season, if not longer, as it would be unexpected for him to be 100% after only 12 months.
27 year old Luis Severino had the surgery in February 2020. He threw 6 innings in 2021 because a few other things kept being sore.
Syndergaard had it in 2020, threw 2 innings in 2021.
Tyler Beede, March 2020, threw 1 inning in 2021.
Chris Sale, March 2020, still hasn’t avoided injury, came back Mid August 2021.
The only guy I can find in recent years who was back in 14 months was Glasnow, who pitched in 2 games in September and October of this year 14 months after the surgery.