Mayer-Baumgardner unification signed, targeted for “late summer/early fall”

After a lengthy war of words on social media, super featherweight champions Mikaela Mayer and Alycia Baumgardner have officially signed to meet in “late summer or early fall” on “an ESPN platform.”

“Mikaela Mayer’s prodigious talent is only matched by her tremendous ambition,” said Top Rank chairman Bob Arum. “She wants the…