Heck yeah. He had the WBA Heavyweight title for a while, tho Holmes was recognised as the universal champ. Ironically it was against Holmes earlier (For his title) that Weaver came to believe in himself after giving Larry all kinds of drama.
It was late in his career, but if you want injuries, Willie Pep almost died in a plane crash. B-Hop, Arguello, Armstrong, Marquez all lost their first pro fights. Pipino Cuevas had a slow start. His record was so much better in title fights than non-title ones.
kirino garcia lost his first 20 fights but went on to become a competant journeyman/fringe contender.