Rabbi Yosi cited "three statements in the name of three elders": Makkot 19a; Temurah 21a-b
Rav recanted on a ruling which opposed Rabbi Yosi's view, because Rabbi Yosi "always has a reason [Nimuko Imo]": Eruvin 14b
Rabbah making a statement in the name of Rabbi Yosi to Rav Yosef, not because Rabbi Yosi actually said it, but because that way Rav Yosef would accept it: Eruvin 51a
Rabbi Yosi exclaimed to the sages in a debate, "Dikdaktem Acharai!" [Rashi: You defeated me and stabbed me]: Keritot 19b
Personal Practices
Relating the Chalitzah Method of Rabbi Yehudah Ben Beteirah to a Sage in Netzivin: Yevamot 102a (Note that in the Tosefta this story is ascribed to Rabbi Shimon)
Rescinded a man's vow, because it had been made only in an attempt to convince his wife to listen to him, and she hadn't listened: Nedarim 23a
How we decide law when Rabbi Yosi disagrees with a group: Eruvin 46b