https://www.tsn.ca/mlb/blue-jays-alek-manoah-has-tommy-john-surgery-out-12-14-months-1.2136460
Manoah had a fully ligament replacement but with an added brace. The internal brace can be used on it's own when there isn't sufficient damage to require a full ligament replacement, but that wasn't the case with Alek.
https://www.sportsnet.ca/mlb/article/blue-jays-alek-manoah-has-surgery-will-return-to-toronto-for-rehab/