Yes Ottavino has converted his 72 of his 87 "save" opportunities (83%) in the last 3 seasons with 8 saves and 64 holds, and Barnes has converted 68 of his 83 opportunities (82%) with 13 saves and 55 holds. So they are similar to each other, along with being just behind Kenley Jansen (85%), Liam Hendricks (85%) and Josh Hader (86%). Some other elite relievers are not so far off, including Brad Hand (89%), Edwin Diaz (87%), and Aroldis Chapman (89%). From what I can see, the conversion leader since 2018 appears to be Kirby Yates (95%)...