As andyb said there is natural matriculation up the ranks, so I have been going to 50 since 2015 and this will only capture the ranked, not anyone unranked, I have included the 30+ rank+year and their highest ranking+year. I also just sometimes miss.
2015: Rhys Hoskins (#37->#12 2017), Edubray Ramos (#38->#26 2016), Adam Morgan (#45<-#2 2013), Brandon Leibrandt (#48)
2016: Dylan Cozens (#31->#13 2017), Luke Williams (#36), Bailey Falter (#42->#14 2021), Tyler Gilbert (#46)
2017: Victor Arano (#31<-#14 2015), Ben Lively (#32<-#11 2015), Jesmuel Valentin (#33<-#22 2015), Deivi Grullon (#34<-#15 2015), Cole Irvin (#37->#17 2018), Francisco Morales (#38->#3 2020), Joely Rodriguez (#41<-#24 2015), Mauricio Llovera (#44->#16 2019), Edgar Garcia (#49)
2018: Jesmuel Valentin (#32<-#22 2015), Bailey Falter (#34->#14 2021), Dylan Cozens (#35<-#13 2017), Edgar Garcia (#37), J.D. Hammer (#41), Dalton Guthrie (#49->#18 2023)
2019: Matt Vierling (#34->#9 2022), Nick Maton (#35->#11 2021), Edgar Garcia (#36), Cole Irvin (#37<-#17 2018), Bailey Falter (#41->#14 2021), Drew Anderson (#46->#24 2018)
2020: Cole Irvin (#32<-#17 2018), Connor Brogdon (#40->#18 2021)
2021: Cristopher Sanchez (#31<-#16 2020), James McArthur (#32->#21 2022), Ramon Rosso (#37), Ben Brown* (#40), Luke Williams (#54), Mauricio Llovera (#55<-#16 2019)
2022: Ben Brown* (#46), JoJo Romero (#47<#7 2019)
2023: James McArthur (#41<-#21 2022)
2024: Michael Mercado (#31)
*Ben Brown would have been top 10 at 2022 midseason if I used actual numbers
Ranger Suarez for example went unranked in 2017, #25 by midseason, #18 in 2018, #14 in 2019